Flow and Combustion Characteristics of Wave Rotor–Trapped Vortex Combustor System

Yiqin Kang, Chenlu Wang, Gangyi Fang, Fei Xing and Shining Chan ()
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Yiqin Kang: School of Aerospace Engineering, Xiamen University, Xiamen 361005, China
Chenlu Wang: School of Aerospace Engineering, Xiamen University, Xiamen 361005, China
Gangyi Fang: School of Aerospace Engineering, Xiamen University, Xiamen 361005, China
Fei Xing: School of Aerospace Engineering, Xiamen University, Xiamen 361005, China
Shining Chan: Aircraft & Propulsion Laboratory, Ningbo Institute of Technology, Beihang University, Ningbo 315104, China

Energies, 2022, vol. 16, issue 1, 1-14

Abstract: Breaking through the limit of conventional compression and combustion, wave rotor and trapped vortex combustors are able to improve the thermal efficiency of gas turbines. Detailed two-dimensional numerical simulations based on Ansys Fluent were performed to study the flow and combustion characteristics of the wave rotor–trapped vortex combustor system. The calculated pressure characteristics agree with the experimental results giving a relative error for average pressure of 0.189% at Port 2 and of 0.672% at Port 4. The flow stratification characteristics and the periodic fluctuations were found to benefit the zonal organized combustion in the trapped vortex combustor. For the six cases of different rotor speeds, as the rotor speed increased, the oxygen mass fraction at the combustor inlet rose and then fell. The proportion of exhaust gas recirculation fell at first and then rose, and the combustion mode became unstable with the dominant frequencies of the fluctuations increasing.

Keywords: wave rotor; trapped vortex combustor; exhaust gas recirculation; flow stratification; periodicity; combustion mode (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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