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Single Cavity Trapped Vortex Combustor Simulations

Singhal, Atul and Shetty, Dinesh A and Ravikrishna, RV (2006) Single Cavity Trapped Vortex Combustor Simulations. In: Proceedings of the 8th National Conference on Air-breathing Engines and Aerospace Propulsion, December 12-14 2006, Pune.

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Abstract

The present work describes steady and unsteady computation of reacting flow in a Trapped Vortex Combustor. The primary motivation of this study is to develop this concept into a working combustor in modern gas turbines. The present work is an effort towards development of an experimental model test rig for further understanding dynamics of a single cavity trapped vortex combustor. The steady computations with and without combustion have been done for L/D of 0.8, 1 and 1.2; also unsteady non-reacting flow simulation has been done for L/D of 1. Fuel used for the present study is methane and Eddy-Dissipation model has been used for combustion-turbulence interactions. For L/D of 0.8, combustion efficiency is maximum and pattern factor is minimum. Also, primary vortex in the cavity is more stable and symmetric for L/D of 0.8. From unsteady non-reacting flow simulations, it is found that there is no vortex shedding from the cavity but there are oscillations in the span-wise direction of the combustor.

Item Type: Conference Paper
Keywords: Trapped Vortex Combustor;pattern factor;combustion efficiency
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 22 Nov 2011 06:43
Last Modified: 22 Nov 2011 06:43
URI: http://eprints.iisc.ernet.in/id/eprint/42309

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