Performance Evaluation of a Trapped Vortex Combustor Configuration Using RANS Simulations

Nisanth, MS and Panda, PP and Ravikrishna, RV (2022) Performance Evaluation of a Trapped Vortex Combustor Configuration Using RANS Simulations. In: AIAA Science and Technology Forum and Exposition, 3-7 Jan 2022, San Diego.

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Abstract

Cavity-based flame stabilization with dual-vortex configuration has superior performance benefits over conventional gas turbine combustors. Single-injection port on the upstream cavity wall has minimal constructional difficulties among other cavity injection strategies. In the current work a Trapped Vortex Combustor (TVC) is designed using a single injection port for premixed cavity flow and excluded any flame holders in the main flow. This TVC configuration ensure a light-weight combustor design for aeropropulsion and power generation applications. Parametric analysis of the combustor is performed using Reynolds Averaged Navier-Stokes (RANS) simulations. Cavity flame can be stabilized in the upper vortex, lower vortex, or between the vortices based on the jet momentum flux ratio (J), defined as the ratio of momentum flux of the cavity flow and main flow. Main flame stabilization and pollutant emissions are related to the jet momentum flux ratio and the height of the main duct, which regulate the penetration of cavity flow into the main flow and entrainment of the main flow into the cavity. Combinations of the cavity and main fuel injection are used to operate the combustor at a specific overall equivalence ratio. The numerical simulations in the TVC configuration are used to identify the optimum range of parameters, such as the jet momentum flux ratio and equivalence ratio of the cavity and main flow, that leads to a desired combustor exit temperature and pollutant emissions. © 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Item Type:	Conference Paper
Publication:	AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to American Institute of Aeronautics and Astronautics Inc, AIAA
Keywords:	Aviation; Combustion; Momentum; Navier Stokes equations; Pollution; Propulsion; Stabilization; Vortex flow, Cavity flow; Equivalence ratios; Flame stabilization; Injection ports; Jet momentum; Momentum flux ratios; Pollutants emissions; Reynold-averaged navier-stokes simulations; Reynolds-averaged navier-stokes simulations; Trapped vortex combustor, Combustors
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	07 Feb 2022 12:02
Last Modified:	07 Feb 2022 12:02
URI:	http://eprints.iisc.ac.in/id/eprint/71174

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