Study on Energy Conversion Characteristics in Volute of Pump as Turbine  

作　　者：Senchun Miao Hongbiao Zhang Fengxia Shi Xiaohui Wang Xijin Ma 

机构地区：[1]School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,China [2]Jiangsu Shuangda Pump Valve Group Co.,Ltd.,Jingjiang,China

出　　处：《Fluid Dynamics & Materials Processing》2021年第1期201-214,共14页流体力学与材料加工（英文）

基　　金：Gansu province science and Technology Fund of China[Grant Nos.20JR10RA174,20JR5RA447];Open Research Subject of Key Laboratory of Fluid and Power Machinery(Xihua University),Ministry of Education[Grant Nos.LTDL2020-007,szjj2019-016];Lanzhou University of Technology Hongliu Outstanding Young Teachers Program。

摘　　要：A volute is a curved funnel with cross-sectional area increasing towards the discharge port.The volute of a centrifugal pump is the casing hosting the fluid being pumped by the impeller.In Pump-as-turbine devices(PAT),vice versa the volute plays the role of energy conversion element.In the present analysis,this process is analyzed using CFD.The results show that in the contraction section of volute the conversion between dynamic pressure energy and static pressure energy essentially depends on the reduction of flow area,while in the spiral section,frictional losses also play a significant role.From the throat to the end of the volute,the flow decreases in a wave-like manner.

关 键 词：Pump as turbine VOLUTE energy conversion static pressure power dynamic pressure power 

分 类 号：TH3[机械工程—机械制造及自动化]