高马赫数涡轮发动机性能模拟

Performance Simulation of High Mach Turbine Engine

对马赫数4.0一级的高马赫数涡轮发动机进行了研究,分析了高马赫数涡轮发动机的结构形式和工作原理,建立了性能计算模型。利用泵理论拓展了发动机的低转速部件特性,对某高马赫数涡轮发动机方案进行了性能计算,并分析了其风车冲压模态的性能变化趋势。计算结果表明,该发动机在马赫数3.7时进入风车冲压模态;由于主燃烧室熄火,其推力在模态转换阶段将出现暂时震荡,比冲将在模态转换点达到最低值。

Study on performance of high mach turbine engine with Ma4.0 level was conducted. The struc-ture and operation principle of high mach turbine engine were analyzed, and then the performance simula-tion model was established. The pump theory was used to extend the low-speed component characteristics of engine. The performance of high mach turbine engine was simulated and the varying trend of performance at windmilling ram mode was also analyzed. Results show that the turbine engine would go into windmilling ram mode at Ma3.7, and the thrust would experience temporary fluctuation during mode transition because of the flameout of combustor. The specific impulse would reach the lowest point at mode transition point.