基于功比例因子的径向流内燃波转子发动机热力循环分析

Thermodynamic cycle analysis of radial wave rotor combustor engine based on work coefficient factor

关键词:  内燃波转子  汉弗莱循环  热力循环模型  波盘发动机  径向流

Key words:  Wave rotor combustor  Humphrey cycle  Thermodynamic cycle model  Wave disk engine  Radial flow

摘要:

为研究径向流内燃波转子嵌入基准机性能变化规律，提出不同波转子输出功状态点的性能计算方法，建立了基于功比例因子的径向流内燃波转子热力循环分析模型，在理想和考虑损失的状态下开展了不同热力循环对比研究，并探讨了压气机压比和波转子功比例因子对发动机热力循环性能参数影响规律。结果表明，基准机压比为3.6时，在相同涡轮入口状态下，考虑损失时的径向流内燃波转子循环相较于基准机可以实现净功输出增加53.9%，热循环效率提高44.9%，耗油率降低30.9%。波转子完全作为功率输出部件时，可以实现热循环效率达到0.32左右，纯功输出的径向流内燃波转子更适用于较低压气机压比的基准机。

Abstract:

In order to compare the performance variation of radial wave rotor combustor embedded in base engine， the calculation method of different wave rotor output power state points was proposed， and the thermal cycle analysis model of radial wave rotor combustor based on the wave rotor work coefficient factor was established. A comparative study of different thermodynamic cycles is carried out under ideal and loss-considering conditions， and the influence of compressor pressure ratio and wave rotor work coefficient factor on engine thermodynamic cycle performance parameters is discussed. The results show that the loss-considering radial wave rotor combustor can increase the net work output by 53.9%， increase the thermal cycle efficiency by 44.9%， and reduce the specific fuel consumption by 30.9% when the base engine pressure ratio is 3.6 at the same turbine inlet condition. When the wave rotor is completely used as a power output component， the thermal cycle efficiency can reach about 0.32. The radial wave rotor combustor with pure power output is more suitable for the base engine with a lower compressor pressure ratio.