Combustion instabilities in sudden expansion oxy–fuel flames

TL;DR: In this paper, the authors present methods and systems for controlling a combustion reaction and the products there-of, which includes a combustion control system having an oxygenation stream substantially comprising oxygen and CO2 and having a oxygen to CO2 ratio, then mixing the oxygenation streams with a combustion fuel stream and combusting in a combustor to generate a combustion products stream having a temperature and a composition detected by a temperature sensor and an oxygen analyzer, respectively, the data from which are used to control the flow and composition of the combustion fuel streams.

TL;DR: In this paper, an 800 MWe oxy-combustion pulverized coal-fired power plant was simulated and analyzed using the commercial flowsheet software Aspen Plus, and the base simulation result indicates that Aspen plus is a proper tool to research the oxycombion system.

TL;DR: In this article, a spool piece for a combustor for a gas turbine is described, which includes an oxidant injection port and a recycle-gas extraction port, where the recycle gas is isolated from the oxidant prior to use in a flame.

TL;DR: In this article, a gas turbine system is configured to stoichiometrically combust a compressed oxidant derived from enriched air and a fuel in the presence of a compressed recycle exhaust gas and expand the discharge in an expander.

TL;DR: In this paper, the authors present a discussion of different methods which can be used to suppress combustion instabilities using active control, as well as a review of the work which has recently been performed in this area of combustion research.

TL;DR: In this article, a simplified combustion system, from compressor outlet to turbine inlet, is modeled as a one-dimensional mean with linear perturbations, which leads to predictions for the frequencies of oscillations and the susceptibility to instabilities for which linear disturbances grow expotentially in time.

TL;DR: In this article, the authors investigated low-frequency vortex-driven combustion instability in the case of a multiple inlet combustor with dump and showed that lowfrequency instabilities are acoustically coupled and occur at the eigenfrequencies of the system.

TL;DR: In this paper, the authors construct an analytical model to describe the dynamic response of a laminar premixed flame stabilized on the rim of a tube to velocity oscillation, and obtain a time-domain differential equation describing the relationship between the velocity perturbation and the heat release response over the entire frequency range.