Non-reacting Numerical Simulation of Axisymmetric Trapped Vortex Combustor

DAKKA, SAM; Singh, Kuldeep; Jefferson-Loveday, Richard; Serhat, Heval

Abstract

This paper will focus on suitability of trapped vortex combustor as a candidate for gas turbine combustor objective to minimize pressure drop across combustor and investigating aerodynamic performance. Non-reacting simulation of axisymmetric cavity trapped vortex combustors was simulated to investigate the pressure drop for various cavity aspect ratios of 0.3, 0.6 and 1 and for air mass flow rates of 14 m/s, 28 m/s and 42 m/s. Numerical study of axisymmetric trapped vortex combustor was carried out by using two-dimensional and three-dimensional computational domains. A comparison study was conducted between Reynolds Averaged Navier Stokes (RANS) k-ε Realizable with enhanced wall treatment and RANS k-ω Shear Stress Transport (SST) models to find the most suitable turbulence model. It was found that the k-ω SST model gives relatively close results to experimental outcomes. The numerical results were validated and showed good agreement with the experimental data. Pressure drop rises with increasing air mass flow rate, and the lowest pressure drop was observed at 0.6 cavity aspect ratio for all air mass flow rates tested, which agrees with the experimental outcome. Mixing enhancement study showed that 30-degree angle air injectors provide improved fuel-air mixing.

Citation

DAKKA, S., Singh, K., Jefferson-Loveday, R., & Serhat, H. (2023, December). Non-reacting Numerical Simulation of Axisymmetric Trapped Vortex Combustor. Presented at ICAAAE 2023: 17. International Conference on Aeronautical and Aerospace Engineering, London

• Presentation Conference Type: Conference Paper (published)
• Conference Name: ICAAAE 2023: 17. International Conference on Aeronautical and Aerospace Engineering
• Start Date: Dec 11, 2023
• End Date: Dec 12, 2023
• Acceptance Date: Dec 12, 2023
• Online Publication Date: Dec 12, 2023
• Publication Date: Dec 12, 2023
• Deposit Date: Dec 18, 2023
• Publicly Available Date: Jan 9, 2024
• Publisher: World Academy of Science, Engineering and Technology
• Volume: 17
• Pages: 1
• Series Title: Journal of Aerospace and Mechanical Engineering
• Series ISSN: 1307-6892
• Keywords: Aerodynamic, Computational Fluid Dynamics, Propulsion, Trapped Vortex Combustor
• Public URL: https://nottingham-repository.worktribe.com/output/28706408
• Publisher URL: https://publications.waset.org/abstracts/168401/non-reacting-numerical-simulation-of-axisymmetric-trapped-vortex-combustor
• Related Public URLs: https://waset.org/aeronautical-and-aerospace-engineering-conference-in-December-2023-in-london