Research on Pressure Pulsation Characteristics and Flow Induced Noise in Axial-flow Pump

China Rural Water and Hydropower ›› 2020 ›› (2) : 168-174.

Research on Pressure Pulsation Characteristics and Flow Induced Noise in Axial-flow Pump

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Abstract

In order to study the effect of rotational speed on the pressure fluctuation characteristics and flow-induced noise in an axial flow pump, the pressure fluctuation characteristics at different monitoring points in an axial flow pump under three sets of rotational speeds are obtained by calculating the unsteady values of the axial flow pump. The noise field caused by rotating dipole source of blade is further simulated, and the effect of rotating speed on flow induced noise of axial flow pump is analyzed. The results show that the main and secondary frequencies of pressure fluctuation monitoring points are basically the same at three groups of rotating speeds. With the decrease in rotating speed, the amplitude of pressure fluctuation decreases gradually, and the sound pressure level of radiated sound field decreases gradually. The study of pressure fluctuation characteristics inside the axial flow pump has a guiding role in the control of flow-induced noise.

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axial flow pump / speed / pressure fluctuation / flow induced noise

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. Research on Pressure Pulsation Characteristics and Flow Induced Noise in Axial-flow Pump. China Rural Water and Hydropower. 2020, 0(2): 168-174

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