Review of research in hydrodynamic noise of centrifugal pump
LANG Tao，LIU Yutao，CHEN Keqiang，XU Enxiang，JIN Licheng，JIANG Xiaoping
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China;2. National Engineering and Technology Center for Information Agriculture, Nanjing Agricultral University, Nanjing, Jiangsu 210095, China
Abstract：The research status of hydrodynamic noise of centrifugal pump is introduced from four aspects: component, theoretical analysis, numerical simulation, and experiment.Based on the research work in the world, the current research status of the components and influencing factors of the hydrodynamic noise is summarized in detail in terms of internal sound field and external sound field.The internal sound field can be divided into discrete noise and broadband noise from the spectrum characteristics of the noise. The discrete noise is mainly caused by the dynamic static interference, and the energy is concentrated in the blade passing frequency and its harmonic frequencies.In the research of broadband noise, a lot of work still need to be done.FW-H equation is the basic equation for calculating the hydrodynamic noise of centrifugal pump in the theory of acoustic analogy, which is extensively used. At the same time, the theory of vortex sound also shows a quite good development prospect. At present, the hybrid numerical simulation based on the acoustic analogy method is the mainstream approach for simulating the hydrodynamic noise of centrifugal pump, thus, the application of the acoustic propagation equation method such as the linear Euler method(LEE)is less adopted. Nevertheless, the acoustic propagation equation method will be applied with continuously unfolding study on the high-frequency noise of centrifugal pump in the future.The hydrophone-based dual port model can measure the low-frequency noise of centrifugal pump accurately, but this method requires higher standard testing conditions and is costly. The microphone array method has a better prospect in measuring the high-frequency noise in the internal sound field of centrifugal pump. Finally, the problems to be solved in the future and the topics worthy of being noted are put forward.
郎涛,刘玉涛,陈刻强,徐恩翔,金力成,蒋小平. 离心泵水动力噪声研究综述[J]. 排灌机械工程学报, 2021, (1): 8-15.
LANG Tao,LIU Yutao,CHEN Keqiang,XU Enxiang,JIN Licheng,JIANG Xiaoping. Review of research in hydrodynamic noise of centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2021, (1): 8-15.