Research on the influence of piping system on the fluid-dynamic noise of centrifugal pump

Abstract

Abstract During the experimental research of the fluid-dynamic noise generated by a centrifugal pump, the accurate measurement of its acoustic characteristics can only be achieved when the pump is connected to a pipeline system. If the noise at a specific position of the centrifugal pump or its suction and discharge pipelines is used to directly describe the internal sound source characteristics of the pump during the test, there may be a broad difference in the experimental data depending on the specific system and the measuring position. Therefore, in order to verify the influence of different piping systems on the acoustic characteristics at a certain position of the inlet and outlet pipeline of the centrifugal pump, three different discharge pipeline schemes of the piping system were set up in this study. Meanwhile, this study solved the scattering matrix of a centrifugal pump using experimental methods. This method can be used independently of the testing system to describe the transmission and reflection characteristics at the ports of a centrifugal pump, and accurately solve the acoustic characteristics of the pump itself in future research.