Instability analysis for a centrifugal pump with straight inlet pipe using partially averaged Navier-Stokes model

doi:10.1177/0957650920919540

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Instability analysis for a centrifugal pump with straight inlet pipe using partially averaged Navier-Stokes model
	Ye WX 4; Qian ZD 3; Huang RF(黄仁芳)2; Li XJ 1; Zhu ZC 1; Luo XW 4
刊名	PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
	2020-04-21
页码	16
关键词	Centrifugal pump inlet pipe positive slope phenomenon PANS model
ISSN号	0957-6509
DOI	10.1177/0957650920919540
英文摘要	The current study numerically investigates the flow instability under several part-load conditions in a centrifugal pump with a straight inlet pipe to explore the underlying relationship between a positive slope phenomenon and internal flow using a partially averaged Navier-Stokes model. The model was validated by comparing the hydraulic performance and averaged flow in the impeller between the numerical results and experimental data of a tested pump. The internal flows in pumps have been intensively investigated based on Batchelor vortex family, Rayleigh-Taylor criterion, entropy generation rate, and energy equation to analyze the flow instability from different aspects. The simulation results using partially averaged Navier-Stokes model are acceptable due to the good agreement with the experimental data for the tested pump. No matter the geometry of the inlet pipe, the pre-swirling flows in the inlet pipe are in the convective instability region. Under the part-load condition of phi = 0.5 phi(bep), the axial vorticity coefficient is affected by the geometry of the inlet pipe. However, under the part-load condition with rotating stall, e.g. phi = 0.78 phi(bep), the flow in the inlet pipe is affected by the unstable flow in the pump impeller. For the pump with a straight inlet pipe, the vortex inside the blade-to-blade passage is in a stable state according to Rayleigh-Taylor criterion under the condition of phi = 0.5 phi(bep). However, the vortex in the blade-to-blade passage is in an unstable state due to centrifugal instability under those operation conditions with rotating stall cells in the impeller, and the dominant oscillations are dependent on the propagation of rotating stall cells. Finally, head loss analysis based on energy equations elucidates that turbulent kinetic energy production term is predominant in the head loss in pump impeller. The present results are helpful for better understanding of the unstable flows and positive slope phenomenon for centrifugal pumps.
分类号	Q3
WOS关键词	NUMERICAL-SIMULATION ; SWIRLING FLOW ; TURBULENCE MODELS ; TURBINE ; VORTEX ; PERFORMANCE ; CAVITATION ; EQUATION ; PANS
WOS研究方向	Thermodynamics ; Engineering
语种	英语
WOS记录号	WOS:000527975900001
资助机构	National Key R&D Program of China[2018YFB0606101] ; National Natural Science Foundation of China[51536008] ; Beijing Natural Science Foundation[3182014] ; Tsinghua National Laboratory for Information Science and Technology
其他责任者	Luo, Xianwu
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/84790]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Zhejiang Sci Tech Univ, Key Lab Fluid Transmiss Technol Zhejiang Prov, Hangzhou, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing, Peoples R China; 3.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China; 4.Tsinghua Univ, Dept Energy & Power Engn, State Key Lab Hydrosci & Engn, Beijing, Peoples R China;
推荐引用方式 GB/T 7714	Ye WX,Qian ZD,Huang RF,et al. Instability analysis for a centrifugal pump with straight inlet pipe using partially averaged Navier-Stokes model[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,2020:16.
APA	Ye WX,Qian ZD,黄仁芳,Li XJ,Zhu ZC,&Luo XW.(2020).Instability analysis for a centrifugal pump with straight inlet pipe using partially averaged Navier-Stokes model.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,16.
MLA	Ye WX,et al."Instability analysis for a centrifugal pump with straight inlet pipe using partially averaged Navier-Stokes model".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY (2020):16.