排灌机械工程学报

作者：CHRISTOPHER Stephen, YUAN Shouqi, PEI Ji, CHENG Xing

单位：1. Department of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology, Chennai, Tamil Nadu 600062, India; 2. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China

关键词：vertical inline pump, fluidborne noise, return flow, inlet pipe, PROUDMAN

基金：State Key Program of National Natural Science Foundation of China (51239005)

The objective of present work is to find out the sources of fluidborne noise in vertical inline pump for various flow rates. The threedimensional unsteady Reynolds Average Navier Stokes equation is solved using computational fluid dynamics code to predict the acoustic distribution. The pump chosen for study is of low specific speed and the experimental performance characteristic is very well matched with computational head developed. PROUDMAN sound power contour analysis shows the critical zone of noise in inlet pipe, impeller, and volute. Based on this, the variations of acoustic power were depicted over the cross section of inlet pipe, along the mean streamline of inlet pipe, as well along the volute circumference . The result concludes that the predominant flow noise is at tongue region and followed by noise generated due to turbulence in inlet pipe which occurs by the sudden variation in flow passage as well it depends on the operating condition of pump. The frequency analysis gives a glimpse of understanding about the broadband noise distribution due to flow phenomenon over a frequency range were discussed.

来源：2019年第2期

《排灌机械工程学报》期刊编辑部

查看排灌机械工程学报杂志2019年第2期