脉冲爆震涡轮发动机共同工作特性

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%.