Study on slip phenomenon of pumps as turbines in different working conditions

doi:10.1115/FEDSM2017-69165

	Study on slip phenomenon of pumps as turbines in different working conditions
	Wang, Xiaohui; Yang, Junhu; Xia, Zhengting
	2017
会议日期	July 30, 2017 - August 3, 2017
会议地点	Waikoloa, HI, United states
关键词	Fluid mechanics Impellers Partial discharges Pumps Discharge conditions Energy recovery Flow parameters Hydraulic efficiency Hydraulic loss Hydraulic performance Impeller passage Pump as turbine (PAT)
卷号	1A-2017
DOI	10.1115/FEDSM2017-69165
英文摘要	Slip phenomenon is known to strongly influence the performance of pump as turbine (PAT). It is of interest to investigate the influence of flow parameters on the slip factor and obtain the effective value of slip factor over the whole range of their working conditions. In the present work, the slip phenomenon of PAT at different working condition was studied, slip factor was calculated in every point of the flow. Furthermore, the relative eddy within the impeller passage was evaluated and the hydraulic performance of PAT was analyzed. The result shows that the slip factor decreases with the increasing flow rate, slip phenomenon induces additional hydraulic loss in impeller passage, it weakened in over-load region, as a consequence, hydraulic efficiency is relatively high. On the contrary, the slip phenomenon strengthened in part-load region, therefore, hydraulic efficiency of PAT is relatively low. It was observed that a relative eddy take place within the impeller passage, the eddy occurs near pressure side of blade at design-point condition, it motions to suction side at high discharge, and divides into two separated eddy at partial discharge condition. The relative eddy cause pressure fluctuate in PAT impeller, which affects the energy recovery of PAT. © Copyright 2017 ASME.
会议录	American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
会议录出版者	American Society of Mechanical Engineers (ASME)
语种	英语
ISSN号	08888116
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/118076]
专题	能源与动力工程学院
作者单位	Key Laboratory of Fluid Machinery and Systems, Gansu Province, School of Energy and Power Engineering, Lanzhou University of Technology, No.287, Langongping Road, Qilihe District, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Xiaohui,Yang, Junhu,Xia, Zhengting. Study on slip phenomenon of pumps as turbines in different working conditions[C]. 见:. Waikoloa, HI, United states. July 30, 2017 - August 3, 2017.