Numerical simulation of non-reacting flow fields in combustors

doi:10.3969/j.issn.0253-2778.2019.11.010

Journal of University of Science and Technology of China ›› 2019, Vol. 49 ›› Issue (11): 940-946.DOI: 10.3969/j.issn.0253-2778.2019.11.010

Numerical simulation of non-reacting flow fields in combustors

ZHANG Hongda

1. AECC Shenyang Engine Research Institute, Shenyang 110015, China; 2. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 3. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China

Received:2019-03-14 Revised:2019-05-06 Online:2019-11-30 Published:2019-11-30

Abstract

Abstract: Very large eddy simulation (VLES) was performed to study non-reacting flow fields in a combustor. Large scale vortex structures were investigated in the flow fields. A benchmark case for turbulent swirling flow in circular tube was studied by numerical simulation. The accuracy of VLES method was verified by a comparison with experimental data. The simulation results show that the shape of the recirculation zone in the combustor is reasonable. The counter-rotating vortex pairs are generated by the interaction between a large hole jet and a crossflow in the combustor. The jet trajectory formula given by Rothstein can reasonably predict the jet penetration of the main combustion hole. The precessing vortex core (PVC) originates from the combustor head swirler. The power spectral density was employed to predict the characteristic frequency of flow oscillation induced by PVC.

Key words: combustor, very large eddy simulation(VLES), swirling flow, counter-rotating vortex pairs, precessing vortex core(PVC)

ZHANG Hongda, WAN Bin, ZHANG Chengkai, LIN Hongjun, SHANG Shoutang, HAN Xingsi, YE Taohong. Numerical simulation of non-reacting flow fields in combustors[J]. Journal of University of Science and Technology of China, 2019, 49(11): 940-946.

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Numerical simulation of non-reacting flow fields in combustors

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