| Citation: | MU Yuanwei, WANG Fengming, ZHU Daming. Modeling and simulation on performance of dual-bypass combined exhaust variable cycle engine[J]. Journal of Aerospace Power, 2023, 38（5）：1114-1122 doi: 10.13224/j.cnki.jasp.20220171
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A performance simulation model of dual-bypass combined exhaust VCE was established by means of aerothermodynamics, and the performance simulation program was compiled to simulate the optimal variable geometry scheme in throttling state and maximum state under two configuration modes. The results showed that the specific fuel consumption of dual-bypass mode was lower 0.7%−2.5% and the thrust was lower 3.1%−5.5% than that of single bypass mode when the configuration was only variable. Performance benefit of the combined variable geometry scheme (scheme 4) with main nozzle, mixer and high-pressure turbine guide was the highest when the components geometry was only variable. Compared with the variable geometry scheme (scheme 1) of only variable main nozzle geometry, the specific fuel consumption under throttling condition of scheme 4 was reduced by 2.7%−3.2%, and the maximum thrust at high altitude was increased by 4.2%−5.2%. Performance benefit of the variable cycle scheme with combination of dual-bypass variable configuration and variable geometry scheme 4 can be further improved. Based on the performance of single bypass engine with individually adjustable main nozzle, the specific fuel consumption under throttling condition of the variable cycle scheme was reduced by 4%, and the maximum thrust at high altitude was increased by 5.2%. Based on the performance of dual-bypass engine with individually adjustable main nozzle, the specific fuel consumption under throttling condition of the variable cycle scheme was reduced by 3.2%, and the maximum thrust at high altitude was increased by 13.7%.
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