Calculation and analysis on velocity slip of pump as turbine

doi:10.13245/j.hust.170912

	Calculation and analysis on velocity slip of pump as turbine
	Wang, Xiaohui 1; Yang, Junhu 2; Xia, Zhengting 1; Guo, Yanlei 2
刊名	Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition)
	2017-09-23
卷号	45 期号:9 页码:64-68
关键词	Centrifugal pumps Efficiency Pumps Statistical mechanics Turbines Head relationship Hydraulic efficiency Pump as turbine (PAT) Renormalization group Slip coefficients Slip factor Turbine operation Velocity slips
ISSN号	16714512
DOI	10.13245/j.hust.170912
英文摘要	Focus on the pump as turbine (PAT), the slip phenomenon was analyzed based on RNG (renormalization group) k-Ε simulation, the distribution of slip factor was revealed for pump mode and turbine mode, and a new method of head relationship between pump and turbine mode was proposed considering slip factor. Results show that slip factor is increasing with the increase of discharge in pump mode but inversely in turbine operation. Relevant hydraulic loss in impeller passage is induced by slip phenomenon. Slip strengthened in part-load region, as a consequence, hydraulic efficiency is low, on the contrary, it weakened in over-load region, therefore, hydraulic efficiency of PAT is high relatively. Then the head relationship between pump mode and turbine mode for 6 selected PATs were calculated based on the proposed new method, and results were compared with those without considering the slip coefficient, which shows that the average error is reduced by 5%~20% using proposed new method. © 2017, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
语种	中文
出版者	Huazhong University of Science and Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114543]
专题	能源与动力工程学院新能源学院
作者单位	1.School of Energy and Power Engineering, China; 2.Key Laboratory of Fluid Machinery and System, Lanzhou University of Technology, Lanzhou; Gansu Province; 730050, China
推荐引用方式 GB/T 7714	Wang, Xiaohui,Yang, Junhu,Xia, Zhengting,et al. Calculation and analysis on velocity slip of pump as turbine[J]. Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),2017,45(9):64-68.
APA	Wang, Xiaohui,Yang, Junhu,Xia, Zhengting,&Guo, Yanlei.(2017).Calculation and analysis on velocity slip of pump as turbine.Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition),45(9),64-68.
MLA	Wang, Xiaohui,et al."Calculation and analysis on velocity slip of pump as turbine".Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) 45.9(2017):64-68.