Book Chapter10.1007/978-981-15-4284-8_8
Methodologies and Solutions of Computational Aeroacoustic Problems
Tapan K. Sengupta,Yogesh G. Bhumkar +1 more
- 01 Jan 2020
- pp 441-519
2
TL;DR: Computational aeroacoustics is an important research area which connects aerodynamics and acoustics and can be broadly categorized into three different methodologies based on the approach for estimating acoustic field.
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Abstract: Computational aeroacoustics (CAA) is an important research area which connects aerodynamics and acoustics. This research area involves simulations of flow-induced acoustic noise and can be broadly categorized into three different methodologies based on the approach used for estimating acoustic field. First two methodologies use computed fluid flow information to further calculate acoustic field details using either an acoustic analogy approach or by solving set of perturbation equations.
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Citations
The acoustic spectrum of axial flow machines
S.E. Wright
- 01 Apr 1975
TL;DR: In this paper, the authors compared rotor spectra from a variety of axial flow machines and acoustic trends examined, and found that the minimum broad band noise generated by ducted and free field rotors corresponds to laminar and turbulent boundary layer shedding.
108
•Book
Computational Aerodynamics and Aeroacoustics
Tapan K. Sengupta,Yogesh G. Bhumkar +1 more
- 18 May 2020
8
References
Universal instability modes in internal and external flows
TL;DR: Sengupta et al. as discussed by the authors used proper orthogonal decomposition (POD) to reveal similar modes for flow past a circular cylinder and flow inside a lid-driven cavity, indicating universality of such modes.
33
Hybrid prediction of the aerodynamic noise radiated by a rectangular cylinder at incidence
TL;DR: In this paper, the acoustic radiation by a laminar flow over a rectangular cylinder at incidence is predicted using a two-step approach using a compact source approximation of Curle's analogy, where the fluctuation of the aerodynamic force is the source quantity.
28
Direct simulation of sound generation by a two-dimensional flow past a wedge
TL;DR: In this paper, a simulation of sound generation due to two-dimensional, unsteady, laminar flow past a wedge at several angles of incidence has been performed using a highly accurate, physical dispersion relation preserving scheme.
25
Aerodynamic sound from a square cylinder with a downstream wedge
TL;DR: In this paper, the effect of placing a wedge in the wake of a square cylinder (side length D) at a Reynolds number of 22,000 is numerically investigated, along with its effect on the flow field.
25
Propagation of sound generated by weak shock-vortex interaction
TL;DR: In this paper, the basic nature of sound generated by the interaction between a single vortex and a shock wave is studied numerically, and the propagation process of the sound from near to far fields is investigated.
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