The Gas-solid Coupling Mechanism And Experiment Research Of Axial-flow Compressor Blades Non-synchronous Vibrations

The engine is the heart of the aircraft. Its performance and reliability have direct impact on the quality and safety of the aircraft. The compressor as an important part of the engine, its performance means a lot to the engine. Non-synchronous vibration of the axial-flow compressor blades will affect the performance of the compressor and reduce the reliability of the compressor, or even lead to the blade fracture and other serious consequences. So it is of important to study axial flow compressor blades non-synchronous vibration.Based on the former study of the non-synchronous vibration of compressor blades, the paper makes a gas-solid coupling theory test bed and verifies the correctness of the gas-solid coupling mechanism according to the test data. It makes a foundation for future research.First, the gas-solid coupling theory test bed of compressor blades is designed. It is used to simulate the situation of non-synchronous vibration of the compressor blades. Modal analysis gets nature frequencies of the test plate which simulate the compressor blades. This makes the preparation for the following experiment.Second, by changing the distance between the jet and the plate, the jet velocity and other factors, we can get the state of non-synchronous vibrations of the compressor. Then we can measure the relationship between the influencing factors and pressure fluctuations of the plate surface and the plate vibration. These factors are jet velocity, measuring position, the distance between the nozzle and the test plate surface and so on.At last, according to the results of the measurement, we can compare with the theory and verify the correctness of the gas-solid coupling mechanism of axial-flow compressor blades non-synchronous vibrations.