Principle experiments on two phase pulse detonation turbine engine

In order to verify the feasibility of the pulse detonation turbine engine(PDTE), a principle experiment system mainly composed of pulse detonation combustor, compressor and turbine, etc., was established. By taking gasoline as fuel and air as oxidizer, the principle experiments of PDTE were carried out. The test results show that the pulse detonation combustor, compressor and turbine can match each other successfully and the engine can stably work at the self-suction mode for a long time. The operating frequency of the engine is up to 18Hz after installation of the pneumatic valve, showing a good attenuation effect on the back propagation detonation wave. It is found that the effect of the pneumatic valve is more significant at low frequencies. When the engine works at 6Hz, the pressure wave peak attenuation is 93.8%, while at 18Hz it is reduced to 78.4%. Decreasing the back propagation pressure is conducive to the coordination between the chamber and the compressor, and at the same time it can shorten the back propagation distance, helping to improve the operating frequency of the engine.