Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller

doi:10.3390/pr8091192

	Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller
	Wang, Xiaohui; Kuang, Kailin; Wu, Zanxiu; Yang, Junhu
刊名	PROCESSES
	2020-09-01
卷号	8 期号:9
关键词	energy recovery pump as turbine vortex hydraulic losses pressure fluctuation
DOI	10.3390/pr8091192
英文摘要	Pump as turbines (PATs) are widely applied for recovering the dissipated energy of high-pressure fluids in several hydraulic energy resources. When a centrifugal pump operates as turbine, the large axial vortex occurs usually within the impeller flow passages. In view of the structure and evolution of the vortex, and its effect on pressure fluctuation and energy conversion of the machine, a PAT with specific-speed 9.1 was analyzed based on detached eddy simulation (DES), and the results showed that vortices generated at the impeller inlet region, and the size and position of detected vortices, were fixed as the impeller rotated. However, the swirling strength of vortex cores changed periodically with double rotational frequency. The influence of vortices on pressure fluctuation of PAT was relatively obvious, deteriorating the operating stability of the machine evidently. In addition, the power loss near impeller inlet region was obviously heavy as the impact of large axial vortices, which was much more serious in low flow rate conditions. The results are helpful to realize the flow field of PAT and are instructive for blade optimization design.
WOS研究方向	Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000583349000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155104]
专题	能源与动力工程学院
作者单位	Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaohui,Kuang, Kailin,Wu, Zanxiu,et al. Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller[J]. PROCESSES,2020,8(9).
APA	Wang, Xiaohui,Kuang, Kailin,Wu, Zanxiu,&Yang, Junhu.(2020).Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller.PROCESSES,8(9).
MLA	Wang, Xiaohui,et al."Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller".PROCESSES 8.9(2020).