A Study on the Unsteady Flow Characteristics and Energy Conversion in the Volute of a Pump-as-Turbine Device  

作　　者：Senchun Miao Hongbiao Zhang Wanglong Tian Yinqiang Li 

机构地区：[1]School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,730050,China [2]Jiangsu Shuangda Pump Valve Group Co.,Ltd.,Jingjiang,214537,China

出　　处：《Fluid Dynamics & Materials Processing》2021年第6期1021-1036,共16页流体力学与材料加工（英文）

基　　金：This work was supported by Gansu Province Science and Technology Fund of China[Grant Nos.20JR10RA174,20JR5RA447,20JR10RA203];Higher Education Industry Support Plan Project of Gansu Province of China[Grant No.2020C-20];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：To study the unsteady flow and related energy conversion process in the volute of a pump-as-turbine(PAT)device,six different working conditions have been considered.Through numerical calculation,the spatio-temporal variation of static pressure,dynamic pressure,total pressure and turbulent energy dissipation have been determined in each section of the volute.It is concluded that the reduction of the total power of two adjacent sections of the PAT volute is equal to the sum of the power lost by the fluid while moving from one section to the other and the power output from the two adjacent sections.For a fixed flow rate,the percentage of static pressure energy at the outlet of the PAT is roughly similar to that of the corresponding volute section,and both show a gradually increasing trend.The turbulent dissipation rate on each section of the PAT volute displays a similar a spatio-temporal behavior for different flow rates.

关 键 词：Pump as turbine VOLUTE energy conversion UNSTEADY numerical simulation 

分 类 号：TH3[机械工程—机械制造及自动化]