脉冲爆震涡轮发动机共同工作特性

为了研究脉冲爆震涡轮发动机（pulse detonation turbine engine,PDTE）共同工作特性和整机性能,建立了其共同工作分析模型。一方面,利用该模型对PDTE原理样机的性能进行了评估并与试验结果进行对比,计算结果表明,模型计算误差不大于11.2%,随着工作频率的提高,PDTE原理样机推力可进一步提升,但共同工作线朝压气机喘振边界靠近。另一方面,以某涡喷发动机为原型,对利用脉冲爆震燃烧室（pulse detonation combustor,PDC）替换主燃烧室后的整机性能进行了研究。计算结果显示:保持PDTE的迎风面积和涡轮前温度与原涡喷相同,PDTE的最佳压气机增压比从原发动机的5.5减小到2.25,当PDTE工作频率达41.5Hz时,流量与原涡喷相同,此时推力比原涡喷提升20.2%,耗油率降低14.0%。 

Cooperating work characteristics of pulse detonation turbine engine

The cooperating work analysis model of pulsed detonation turbine engine (PDTE) was established in order to analyze the cooperating work characteristics of PDTE and its overall performance.On the one hand, using the model to evaluate the performance of PDTE prototype and compare it with the experimental results, the calculation results showed that: the model calculation error was no more than 11.2%. With the increase of operating frequency, the thrust of PDTE prototype can be further improved, but the cooperating work line gradually moved to the compressor surge boundary.On the other hand, the engine performance after replacing the main combustion chamber with a pulse detonation combustor (PDC) was studied by using a turbojet engine as a prototype.The calculation results showed that the windward area and the turbine inlet temperature of the PDTE were the same with the original turbojet engine. The optimal compression ratio of compressor of the PDTE was reduced from 5.5 of the original engine to 2.25. The flow rate was the same with that of the original turbojet engine when the PDTE operating frequency reached 41.5Hz, meanwhile, the thrust increased by 20.2% compared with the original turbojet engine, and the specific fuel consumption reduced by 14.0%.