Numerical Simulation and Entropy Production Analysis of Centrifugal Pump with Various Viscosity  

作　　者：Zhenjiang Zhao Lei Jiang Ling Bai Bo Pan Ling Zhou 

机构地区：[1]National Research Center of Pumps,Jiangsu University,Zhenjiang,212013,China [2]School of Energy and Power Engineering,Jiangsu University,Zhenjiang,212013,China [3]Shandong Xinchuan Mining Equipment Co.,Ltd.,Jining,272300,China

出　　处：《Computer Modeling in Engineering & Sciences》2024年第11期1111-1136,共26页工程与科学中的计算机建模（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52079058 and 52209113);the Natural Science Foundation of Jiangsu Province(Grant Nos.BK20230011 and BK20220544);China Postdoctoral Science Foundation(Grant No.2023M731367);Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX23_3698).

摘　　要：The fluid’s viscosity significantly affects the performance of a centrifugal pump.The entropy production method and leakage are employed to analyze the performance changes under various viscosities by numerical simulation and validated by experiments.The results showed that increasing viscosity reduces both the pump head and efficiency.In addition,the optimal operating point shifts to the left.Leakage is influenced by vortex distribution in the front chamber and boundary layer thickness in wear-ring clearance,leading to an initial increase and subsequent decrease in leakage with increasing viscosity.The total entropy production Spro,Total inside the pump rises with increasing viscosity.The different mechanisms dominate under varying conditions:Turbulent dissipation dominates at low viscosity.Under high-viscosity conditions,energy loss is primarily caused by direct dissipation Spro,D and wall entropy production Spro,W.This study provides a deeper and more objective understanding of the energy characteristics of centrifugal pumps handling fluids of various viscosity,potentially aiding in optimizing pump design and improving energy conversion efficiency.

关 键 词：Centrifugal pump numerical simulation VISCOSITY LEAKAGE entropy production 

分 类 号：TG139[一般工业技术—材料科学与工程]