| Citation: | Sun Ao, Zhao Zhenfeng, Xiong Jingyi, et al. Design and optimization of dual resonance tube exhaust system for aviation piston engines[J]. Journal of Aerospace Power, 2026, 41（X）：20250602 doi: 10.13224/j.cnki.jasp.20250602
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Two-stroke piston engines often employ turbocharging coupled with exhaust resonance technology to address air intake challenges at high altitudes. However, for four-cylinder engines, exhaust gas blocking and pressure interference caused by in-phase exhaust in the exhaust resonance system lead to performance degradation at high altitudes. Therefore, a dual resonance tube exhaust system was designed and optimized based on the exhaust pressure wave propagation theory and a genetic algorithm. Three-dimensional fluid dynamics simulations were conducted to verify that the dual resonance tube exhaust system solved the problem of exhaust gas blocking and pressure interference while effectively utilizing pressure waves to optimize the exhaust backpressure distribution. The simulation and optimization results showed that the engine equipped with the dual exhaust resonance system maintained the original power and achieved a slight increase under conditions up to an altitude of
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