Showing papers on "Throughflow published in 2001"
TL;DR: In this paper, a 4½-layer model with active thermodynamics and mixed-layer physics is used to isolate effects on salinity distributions in the Indian Ocean that result from various forcing mechanisms.
Abstract: A 4½-layer model with active thermodynamics and mixed-layer physics is used to isolate effects on salinity distributions in the Indian Ocean that result from various forcing mechanisms. These forcings include evaporation (e) and precipitation (P) through the ocean surface and inflows across basin boundaries by river runoff in the Bay of Bengal, the Indonesian Throughflow, the Persian Gulf, and the Red Sea. A suite of solutions is obtained in which each forcing is added sequentially. In the solution forced only by P−e, salinity patterns in the upper three layers agree qualitatively with the observations, but values tend to be higher throughout most of the basin. When river inflow into the Bay of Bengal is included, salinity values are significantly improved in the upper three layers, especially in the northern Bay and along the east and west coasts of India. In addition, solutions suggest that during the Northeast Monsoon part of the river water flows out of the Bay in the shallow channel between Sri Lanka and India: Only when this channel is opened in the upper layer do solutions develop a strong, across-shelf salinity gradient along the west Indian coast, consistent with the observations. When the Indonesian Throughflow is added, salinities are lowered in all four layers, especially in the southern tropical ocean. Most of the Throughflow eventually flows out of the Indian Ocean along the western boundary and near Madagascar, but some is advected across the equator by the East African Coastal Current, where it is carried eastward and northward into the central Arabian Sea. Saltier Persian Gulf Water is introduced into the model in layer 3. Some of it subsequently entrains into the surface mixed layer, increasing sea surface salinity by 0.1–0.2 practical salinity units (psu) in a broad region of the Arabian Sea. Saltier Red Sea Water enters the basin in layer 4. It increases layer 4 salinity values throughout much of the Indian Ocean, particularly in the Somali Basin, the interior Arabian Sea, and the central and western equatorial ocean.
222 citations
TL;DR: In this paper, an ENSO-like signal over the equatorial Pacific, with warmer SSTs in the eastern basin, westerly anomalies in wind stress, and increased precipitation along the equator is found.
Abstract: Blocking the Indonesian archipelago by a land bridge, and so preventing flow from the western equatorial Pacific Ocean into the eastern Indian Ocean, causes a global readjustment in the coupled ocean–atmosphere's climate. Notable features found in 10-yr-averaged fields when compared with the control climate are an ENSO-like signal over the equatorial Pacific, with warmer SSTs in the eastern basin, westerly anomalies in wind stress, and increased precipitation along the equator. The band of increased precipitation is flanked by bands of decreased rainfall. Over the Indian Ocean, blocking of the throughflow results in signatures similar to those associated with the Indian Dipole Mode. In the eastern basin, there are cooler SSTs and heat content anomalies. The southeast trades are increased with an associated increase in latent heating. The precipitation belt is shifted northwestward to give decreased rainfall over southern Indonesia and increased rainfall to the north; there is a slight increase in...
80 citations
TL;DR: In this paper, a 3D-PWS circulation model was applied to Prince William Sound, Alaska under forcing of an ocean tide, freshwater runoff, surface heat flux, Alaska Coastal Current (ACC) throughflow (inflow/outflow), and daily (synoptic), spatially varying winds.
Abstract: A three-dimensional, primitive-equation ocean circulation model was applied to Prince William Sound, Alaska (3D-PWS circulation model), under forcing of an ocean tide, freshwater runoff, surface heat flux, Alaska Coastal Current (ACC) throughflow (inflow/outflow), and daily (synoptic), spatially varying winds. The 3D structures and seasonal cycles of the circulation patterns, temperature, salinity (density), and mixed layer are examined. Freshwater runoff significantly contributes to the basin-scale cyclonic circulation, which was not addressed in the previous simulations. Two typical circulation regimes, cyclonic and anticyclonic, characterize the complex flow patterns that depend on the intensities of the ACC thoughflow, freshwater discharge, and the synoptic wind. The spring (April–May) circulation pattern is characterized by a weak (maximum current 0.1 ms−1) anticyclonic flow in the central Sound, while the autumn (September–October) circulation is dominated by a basin-scale, cyclonic gyre (maximum current 0.2 ms−1) due to the increase of the ACC throughflow and the maximum freshwater influence. During the summer, the circulation includes the cyclonic and anticyclonic gyres. During the winter, the circulation pattern is controlled by the basin-scale cyclonic gyre and surface drift driven by the strong north-easterly (south-westward) wind forcing. The seasonal cycles of temperature (T) and salinity (S) vs. depth compare well with the observations. The simulated spring and autumn surface circulation patterns compare qualitatively well with the towed ADCP (acoustic Doppler current profilers) flow patterns and dynamic height patterns in the central Sound. An application of this model to zooplankton overwintering is discussed.
52 citations
TL;DR: In this article, the effect of throughflow on the stability of double diffusive convection in a porous layer is investigated for different types of hydrodynamic boundary conditions, where the lower and upper boundaries are assumed to be insulating to temperature and concentration perturbations.
Abstract: The effect of throughflow on the stability of double diffusive convection in a porous layer is investigated for different types of hydrodynamic boundary conditions. The lower and upper boundaries are assumed to be insulating to temperature and concentration perturbations. The resulting eigenvalue problem is solved by the Galerkin technique. The curvature of the basic temperature as well as solute concentration gradients significantly affects the stability of the system. It is observed that, for a suitable choice of parametric values, Hopf bifurcation occurs always prior to direct bifurcation, and the throughflow alters the nature of bifurcation. In contrast to the single component system, it is found that throughflow is (a) destabilizing even if the lower and upper boundaries are of the same type, and (b) stabilizing as well as destabilizing, irrespective of its direction, when the boundaries are of different types.
34 citations
TL;DR: In this paper, the instability of Ekman boundary layer flow is studied inside a rotating annular cavity with radial throughflow, which is a relevant geometry of the air cooling system in turbines.
29 citations
TL;DR: In this article, a 4½ layer model is used to study intermediate-water circulation in the Pacific Ocean, where the water in each subsurface layer is formed by specific processes, and hence can be interpreted as corresponding to a distinct water-mass type.
Abstract: A 4½ layer model is used to study intermediate-water circulation in the Pacific Ocean. Solutions are forced by annual-mean winds. They are also driven by a prescribed inflow of water through the southwestern corner of the basin [12 Sv (Sv ≡ 106 m3 s−1)] and a compensating outflow in layers 1, 2, and 3 through the western boundary just north of the equator; this mass exchange simulates the Pacific interocean circulation (IOC), in which intermediate water enters the South Pacific, and the same amount of upper water exits via the Indonesian passages. The water in each subsurface layer is formed by specific processes, and hence can be interpreted as corresponding to a distinct water-mass type. The types are thermocline water generated by subtropical subduction (layer 2), upper-intermediate and lower-thermocline water generated by midlatitude subduction in the North and South Pacific (NPIW and SPLTW, respectively; layer 3), and lower-intermediate water that corresponds to Antarctic Intermediate Water ...
25 citations
TL;DR: In this paper, the authors measured and measured the concentrations and loads of a range of chemicals including nitrate, dissolved organic carbon, and phosphorus in overland flow and throughflow from grazed standard and improved pastures in a region of the Adelaide Hills, South Australia.
Abstract: Shallow drains are increasingly being installed to allow cropping and improve pastures in soils prone to waterlogging. Concentrations and loads of a range of chemicals including nitrate, dissolved organic carbon, and phosphorus were measured in overland flow and throughflow (drainage) from grazed standard and improved pastures in a region of the Adelaide Hills, South Australia, with 544 mm annual rainfall. In low to average rainfall years, nitrate losses from standard pastures were up to 21 times higher in throughflow (up to 0.3 kg/ha.year) than in overland flow. Dissolved organic carbon losses from standard pastures were also highest in throughflow (up to 3.5 kg/ha.year) as were loads of Na, Cl, Al, Fe, K, and Mg. Total P loads were higher in throughflow (0.15 kg/ha.year) than in overland flow. However, P concentrations in throughflow were similar to overland flow (up to 0.5 mg/L). Chemical loads from improved pastures were higher in throughflow than in overland flow. Nitrate, dissolved organic carbon, and P losses from improved pastures were up to 0.8, 8.5, and 0.1 kg/ha.year, respectively. Improved pastures had higher dissolved organic carbon concentrations (14 mg/L) and nitrate concentrations than either the standard pastures or those reported off some dairy pastures in the region. Nitrate concentrations were highest in throughflow in subsurface tube drains below the improved pastures (up to 67 mg/L).
20 citations
TL;DR: In this article, the authors used the finite element method to model the heat transfer phenomenon through permeable cracks in hydrothermal systems with upward throughflow, and derived analytical solutions for the temperature distribution along the vertical axis of a crack in a fluid-saturated porous layer.
Abstract: We use the finite element method to model the heat transfer phenomenon through permeable cracks in hydrothermal systems with upward throughflow. Since the finite element method is an approximate numerical method, the method must be validated before it is used to solve any new kind of problem. However, the analytical solution, which can be used to validate the finite element method and other numerical methods, is rather limited in the literature, especially for the problem considered here. Keeping this in mind, we have derived analytical solutions for the temperature distribution along the vertical axis of a crack in a fluid‐saturated porous layer. After the finite element method is validated by comparing the numerical solution with the analytical solution for the same benchmark problem, it is used to investigate the pore‐fluid flow and heat transfer in layered hydrothermal systems with vertical permeable cracks. The related analytical and numerical results have demonstrated that vertical cracks are effective and efficient members to transfer heat energy from the bottom section to the top section in hydrothermal systems with upward throughflow.
18 citations
TL;DR: In this paper, a reduced-gravity model is used to investigate the dynamics of a buoyant flow through a strait driven by pressure difference of the adjoining basins, assuming the flow to be hydraulically controlled so that the transport is maximized.
Abstract: A reduced-gravity model is used here to investigate the dynamics of a buoyant flow through a strait driven by pressure difference of the adjoining basins. Assuming the flow to be hydraulically controlled so that the transport is maximized, flow structures in the upstream basin, during its transit through the strait and along the downstream coast, are determined. It is found in particular that the combined effect of friction exerted by the sill and stretching of the buoyant layer as it exits the strait may cause the downstream flow to exhibit two velocity maxima—along the layer outcrop and the coastal boundary. When applied to the Tsushima Current of the Japan/East Sea, the required conditions for branching are amply satisfied, the model thus provides a plausible explanation of this observed feature. In addition, a favorable comparison between predicted and observed transports supports the hydraulic control of the flow.
14 citations
Patent•
28 Jun 2001
TL;DR: In this article, a method of measuring the throughflow of a gas mixture is proposed, in which the gas mixture flows past a flow sensor which includes a heating device and a first temperature probe reacting to the temperature of the heating device.
Abstract: In a method of measuring the throughflow of a gas mixture, the gas mixture flows past a flow sensor which includes a heating device and a first temperature probe reacting to the temperature of the heating device. A temperature, which is characteristic of the temperature of a liquid above which the gas mixture stands as vapor, is measured with a second temperature probe. A first measurement signal characterizing the composition of the gas mixture and thus its heat dissipation capacity is produced using the known vapor-pressure curve of the liquid and the temperature of the liquid. A second measurement signal characterizing the throughflow of the gas mixture is produced using the heating power supplied to the heating device, the temperature of the first temperature probe and the first measurement signal. The method can be used when monitoring the gas return to a filling system and when controlling the gas pump used therein.
13 citations
Journal Article•
TL;DR: In this paper, the onset of Rayleigh-Benard convection in a sparsely packed porous layer with vertical throughflow was investigated using Brinkman's modification of the Darcy flow model with fluid viscosity different from effective viscoity.
Abstract: The onset of Rayleigh-Benard convection in a sparsely packed porous layer with vertical throughflow is investigated using Brinkman's modification of the Darcy flow model with fluid viscosity different from effective viscosity. The critical Rayleigh numbers are obtained for free-free, rigid-rigid and rigid-free boundaries which are insulated to temperature perturbations. It is noted that an increase in the value of viscosity ratio is to delay the onset of convection. Further, it is observed that the throughflow can be used either to suppress or augment convection, depending on the nature of boundaries and also on the values of physical parameters.
TL;DR: In this paper, the instabilities of incompressible flows between two parallel plates in relative motion in a system rotating about an axis perpendicular to the plates are analyzed in the case when a pressure gradient perpendicular to a plate motion is imposed.
Abstract: The instabilities of incompressible flows between two parallel plates in relative motion in a system rotating about an axis perpendicular to the plates are analyzed in the case when a pressure gradient perpendicular to the plate motion is imposed. This system represents the local approximation to flows between differentially rotating disks with imposed throughflow. Relationships of the instabilities to those of the Ekman layer and of the Ekman–Couette layer are discussed.
Patent•
10 Dec 2001
TL;DR: In this paper, an apparatus and a process for impingement cooling of a component exposed to heat in a flow machine is described. But the authors do not specify the components themselves.
Abstract: An apparatus and a process are provided for impingement cooling of a component exposed to heat in a flow machine. The component includes a wall section on at least one side of which at least one impingement air flow impinges, the air flow passing through a flow channel within a surface element arranged spaced apart from the wall section and striking against the wall section to be cooled. The flow channel has an inlet aperture and an outlet aperture, with the outlet aperture directly facing toward the wall section to be cooled, and the inlet aperture has a throughflow cross section which is smaller than the throughflow cross section of the outlet aperture.
Patent•
30 Aug 2001
TL;DR: In this article, the cavitation effect and the mixing effect of the supercavitation field produced by the body (8) that is hard to flow around are considerably amplified, and the body is situated at least partially in a part of the throughflow chamber that expands in the direction of the flow.
Abstract: A device for mixing the components of a mass flow flowing through the same provides a particularly homogenous mixture which remains stable for any length of time, even when the components concerned are generally not miscible or are very difficult to mix. The device has a body (8) which is located in a throughflow chamber (4) and is difficult to flow around. This body is situated at least partially in a part of the throughflow chamber (4) that expands in the direction of the flow, so that the cavitation effect and the mixing effect of the supercavitation field produced by the body (8) that is hard to flow around are considerably amplified.
TL;DR: In this paper, the two dimensional flow of an electrorheological fluid in a concentric cylinder, Couette type apparatus is investigated at different interplate speeds, voltages and axial pressure gradients.
Abstract: The two dimensional flow of an electrorheological fluid in a concentric cylinder, Couette type apparatus is investigated at different inter-plate speeds, voltages and axial pressure gradients. Test results at low, but realistic, loading conditions correlate with Bingham plastic computer fluid dynamics (CFD) package predictions, at each field strength. The package had been pre verified against an analytical solution for the same flow field. In all cases the liquid is taken to be isothermal. Indications are that the rate of throughflow should not interfere severely with the voltage set magnitude of torque transmission. Hence the cooling of slipping clutches by through flow can be contemplated. At present the investigation covers only the case of one stationary and one moving plate with no heat transfer or centrifugal terms.
Book Chapter•
1 Jan 2001
TL;DR: In this article, the authors explore the strategies adopted for observing four representative boundary current systems which have been the subject of detailed studies in recent years: the Kuroshio, the East Australian Current; the Indonesian Throughflow; and the low-latitude boundary current System of the Atlantic.
Abstract: Measurements of oceanic boundary currents for integral quantities such as heat and freshwater transports are very important for studying their long-term impacts on the global climate. There are a variety of boundary currents, including surface, intermediate and deep boundary currents on both the western and eastern sides of ocean basins. The dynamics and physics of these boundary currents are different, as are the ways of monitoring them. Here, we choose to explore the strategies adopted for observing four representative boundary current systems which have been the subject of detailed studies in recent years: the Kuroshio; the East Australian Current; the Indonesian Throughflow; and the low-latitude boundary current System of the Atlantic.
The transport of the Kuroshio south of Japan has been monitored using satellite altimeter
data in conjunction with an empirical relation between the transport and sea surface height
difference across the stream. Monitoring the transport of the East Australian Current has
been achieved by repeated high-resolution expendable bathythermograph (XBT) and/or
conductivity-temperature-depth profiler transects maintained at several locations, supplemented with satellite altimeter data. Repeated XBT transects have also been used to monitor transport of the Indonesian Throughflow, in association with current meter and other instrumental estimations of transport through a few major throughflow straits. Finally, the
complicated flow field of the low-latitude boundary current system of the Atlantic has been
revealed using neutrally buoyant floats, moored current meters and hydrographic observations.
The survey will be continued using further advanced observation technologies.
1 Jan 2001
Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
1 Jan 2001
TL;DR: A submitted manuscript is the version of the article upon submission and before peer-review as discussed by the authors, while a published version is the final layout of the paper including the volume, issue and page numbers.
Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
Patent•
7 Apr 2001
TL;DR: In this article, a device for material and gas exchange from cells, micro-organisms, suspensions, solutions or fluids is described, which is characterised in that flexible walls and structures, which may be linked to functions, permit internal and/or external conditioning processes.
Abstract: The invention relates to a device for a material and gas exchange from cells, micro-organisms, suspensions, solutions or fluids and is characterised in that flexible walls and structures, which may be linked to functions, permit internal and/or external conditioning processes. A geometrically defined arrangement of material exchange and/or gas permeable membranes form the internal structure of the device, which has a directional throughflow. The assembly is constructed such that the device possesses internal and/or external elastic properties and comprises at least one non-rigid, preferably elastic wall and can absorb pressure variations.
Patent•
31 Aug 2001TL;DR: In this article, a hot gas channel is flowed through in virtually horizontal hot gas direction, in which at least one throughflow heating surface is arranged formed by parallel connected evaporator tubes vertically arranged for throughflow of flow medium (W,D).
Abstract: The method for starting a steam producer (1) involves a hot gas channel (6) flowed through in virtually horizontal hot gas direction, in which at least one throughflow heating surface (8) is arranged formed by parallel connected evaporator tubes (14) vertically arranged for throughflow of flow medium (W,D). At least some of the evaporator tubes, before input of hot gas into the hot gas channel are filled with unevaporated flow medium up to a predetermined level. The actual state of fill of the evaporator tubes is determined by a difference pressure measurement between the lower tube inlet (32) and the upper tube outlet (34). The starting heating process is determined on the basis of characteristic values for the boiler geometry and/or the timewise process of the heat offer through the hot gas.
1 Jan 2001
TL;DR: In this article, the temporal behavior of the three-dimensional flow in a non-isothermal rotating cavity with an axial throughflow of air is explored, and it is shown that the angular velocity ratio tends to unity in the vicinity of the throughflow air.
Abstract: The temporal behaviour of the three-dimensional flow (that does not vacillate) in a non-isothermal rotating cavity with an axial throughflow of air is explored. This behaviour is contrasted with that in a heated rotating annulus. Generally, for both systems, the ratio of the flow angular velocities to the system boundary's (angular velocity ratios) are found, even close to boundaries, not equal to unity. However, for the cavity, the angular velocity ratio tends to unity in the vicinity of the throughflow air. Both systems exhibit similar radial distributions of averaged temporal velocity gradient components. Most unsteadiness is found to correspond to regions of high tangential velocity gradients. As a result of the flow drift, these spatial gradients are converted to temporal gradients. The cavity heat transfer is shown to vary almost as much in the tangential direction as in the radial. For the present flows, computations suggest judicious coordinate system angular velocity choices may reduce demands on both convective term treatments and computer resources.
Patent•
27 Sep 2001
TL;DR: A central control unit for an electric instantaneous water heater has individual control units (5,6) at each outlet (4) and when one individual control unit is used for the supply of water at one temperature this is unchanged by operation of another control unit during the discharge period as mentioned in this paper.
Abstract: A central control unit (1) for an electric instantaneous water heater has individual control units (5,6) at each outlet (4) and when one individual control unit is used for the supply of water at one temperature this is unchanged by operation of another control unit during the discharge period.
1 Jan 2001
TL;DR: An analysis of laser Doppler velocimeter (LDV) data for the axial velocity flowfield in the rotor of the Mach 2 inlet flow supersonic throughflow fan (SSTF) is presented in this article.
Abstract: An analysis of laser Doppler velocimeter (LDV) data for the axial velocity flowfield in the rotor of the Mach 2 inlet flow supersonic throughflow fan (SSTF) is presented in this paper. The paper starts with a short description of the SSTF test package to highlight the specifics of the SSTF operation. It is followed by a detailed description of a dedicated LDV system for measurement in a supersonic throughflow fan and the experience gained. Most of the experimental data presented were acquired in a low supersonic throughflow regime (inlet Mach number of 1.4 ). The results and conclusions presented are based mainly on the experimental data only. A limited amount of computational fluid dynamics (CFD) predictions were used for comparison with the experimental results. The CFD methods, however, are not discussed in this paper. As shown in this paper, a reasonably good agreement between the LDV data and the CFD predictions was found for the low supersonic throughflow regime. The design point data (inlet Mach number of 2.0 ) exhibited an unexpectedly high noise in the velocity data in comparison with the data for low supersonic throughflow operating conditions. For the off-design supersonic regime (shock in rotor), substantial differences exist between the experimental and computational data.
Patent•
25 Oct 2001
TL;DR: The screw-type vacuum pump has two meshing screw rotors defining chambers(20-22) with respective volumes which become smaller in the direction of feed, at least two adjacent chambers are directly interconnected by a check valve(41a,41b) with throughflow direction towards the pressure side.
Abstract: The screw-type vacuum pump has two meshing screw rotors(12,14) defining chambers(20-22) with respective volumes which become smaller in the direction of feed. At least two adjacent chambers are directly interconnected by a check valve(41a,41b) with throughflow direction towards the pressure side. The check valve is formed by a continuous valve passage, and the check valve in longitudinal section is constructed asymmetrically in such a way that it has different throughflow characteristics in both flow directions.
4 Jun 2001
TL;DR: An analysis of laser Doppler velocimeter (LDV) data for the axial velocity flowfield in the rotor of the Mach 2 inlet flow supersonic throughflow fan (SSTF) is presented in this paper.
Abstract: An analysis of laser Doppler velocimeter (LDV) data for the axial velocity flowfield in the rotor of the Mach 2 inlet flow supersonic throughflow fan (SSTF) is presented in this paper. The paper starts with a short description of the SSTF test package to highlight the specifics of the SSTF operation. It is followed by a detailed description of a dedicated LDV system for measurement in a supersonic throughflow fan and the experience gained. Most of the experimental data presented were acquired in a low supersonic throughflow regime (inlet Mach number of 1.4). The results and conclusions presented are based mainly on the experimental data only. A limited amount of computational fluid dynamics (CFD) predictions were used for comparison with the experimental results. The CFD methods, however, are not discussed in this paper. As shown in this paper, a reasonably good agreement between the LDV data and the CFD predictions was found for the low supersonic throughflow regime. The design point data (inlet Mach number of 2.0) exhibited an unexpectedly high noise in the velocity data in comparison with the data for low supersonic throughflow operating conditions. For the off-design supersonic regime (shock in rotor), substantial differences exist between the experimental and computational data.© 2001 ASME
Patent•
8 Nov 2001
TL;DR: In this article, a room-heating cooling system with self-generated forced convection comprises at least one heating/cooling body, through which a heat transport medium flows and one or more fans.
Abstract: The room-heating cooling system with self-generated forced convection comprises at least one heating/cooling body (1), through which a heat transport medium flows and one or more fans. The fan(s) (4) via one or more torsion bodies (5) flowed through by heat transport medium is/are driven by a magnetic coupling arrangement. The system is closed. The heat transport medium is fed to the body via a thermostat valve (2) and after throughflow (3) is further removed.
Patent•
19 Feb 2001
TL;DR: In this article, a method for heating and/or vaporization of fluid or gaseous media was proposed, whereby the medium was heated by means of at least one heating device for the supply of heat energy and which was connected to the throughflow device.
Abstract: The invention relates to a device and a method for heating and/or vaporisation of fluid or gaseous media, whereby the fluid or gaseous medium to be heated and/or vaporised flows through at least one throughflow device, with one or more throughflow layers, each one comprising one or several throughflow channels. Said throughflow channels are in the form of microchannels. The medium is heated by means of at least one heating device for the supply of heat energy and which is connected to the throughflow device. A temperature profile is generated in the throughflow channels, in the direction of flow of the medium, such that the medium flowing through the throughflow channels is subjected to various, independently adjustable, surface temperatures in differing regions of the throughflow channels and thus can itself be heated to various target temperatures.
Patent•
23 Aug 2001
TL;DR: In this paper, the butterfly valve connection piece for an internal combustion engine, comprising a housing (1) and a throughflow opening (2) of said housing, is shown to be pivotably arranged around a pivotable axis extending in a perpendicular manner with respect to the longitudinal axis (9) of the through-flow opening.
Abstract: The invention relates to a butterfly valve connection piece for an internal combustion engine, comprising a housing (1) and a throughflow opening (2) of said housing (1), in which a butterfly valve (7) is pivotably arranged around a pivotable axis extending in a perpendicular manner with respect to the longitudinal axis (9) of the throughflow opening (2), the butterfly valve is used to close the throughflow opening (2). When in a closed position, the butterfly valve (7) is inclined at a defined setting angle (10) in relation to the longitudinal axis (9) of the throughflow opening (2). The radial peripheral edge (8) thereof rests against the inner wall of the throughflow opening (2) and the throughflow opening (2) has a cylindrical shape at least in the region where the butterfly valve (7) comes to rest. The cylindrical region of rest in relation to the longitudinal axis (9) of the throughflow opening (2) forms a circular cylinder (17) which is cut on both sides at a certain angle, whereby the levels of the cut are inclined at a similar angle (10) in relation to the longitudinal axis (9) of the throughflow opening (2) and the butterfly valve (7) when arranged in a closed position.