Research on fluid noise reduction technology of aviation fuel pump

Aviation fuel pump has the problem of flow-induced noise in engineering application，which can affect the unit operation stability and staff's working security. To solve these problems，the noise reduction technique for fuel pump is introduced. Firstly，the noise data of fuel pump acquired during the on-land system test of air plane is tested，and the noise amplitude and frequency are analyzed. Then，numerical simulation is conducted to understand the flow regime in the fuel pump. Finally，the optimization design is conducted for impeller and guide vane of fuel pump. The results show that the main reason of flow-induced noise is the pressure fluctuation caused by rotor-stator interaction between impeller and guide vane. The pressure fluctuation can be reduced by increasing the impeller and vane blade number and applying the alternate loading technique. After optimization，the noise of fuel pump is decreased by 6.5 dB.