IMECH-IR  > 流固耦合系统力学重点实验室
Investigation of flow instability characteristics in a low specific speed centrifugal pump using a modified partially averaged Navier-Stokes model
Ye, WX; Luo, XW; Huang RF(黄仁芳); Jiang, ZW; Li, XJ; Zhu, ZC
Corresponding AuthorLuo, Xianwu(luoxw@tsinghua.edu.cn)
Source PublicationPROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
2019-11-01
Volume233Issue:7Pages:834-848
ISSN0957-6509
AbstractIn this study, a modified partially averaged Navier-Stokes (MPANS) model is applied to investigate the flow instability characteristics in a low specific centrifugal pump. In MPANS model, the unresolved-to-total ratio of kinetic energy f(k) is determined according to the local grid size and turbulence length scale. The numerical results by MPANS model are compared with that simulated by SST k-omega model and the available experimental data. It is noted that MPANS model shows better performance for investigating the unstable flow in the current pump under part-load operation conditions. The time-averaged internal flow and flow incidence in the pump impeller depicts that with the decreasing flow coefficient, flow separation develops in the impeller. Owing to the strong separation flow as well as vortex evolution, incidence angle is large and varies remarkably at the entrance of blade-to-blade passage in the pump impeller. The evolution dynamics of rotating stall is further discussed in detail based on vorticity transport equation. During the evolution of rotating stall, the vortex stretching term has an important effect on vorticity transport under the part-load conditions. The analysis of the pressure fluctuations excited by periodic evolution of rotating stall shows that the rotating stall cell propagates along the rotational direction, and identifies the rotating stall frequency (f(stall)), which is much lower than the rotational frequency of the impeller, f(n) (f(stall) = 8.76% f(n)). Finally, two-dimensional Lagrangian coherent structure (LCS) is used to reveal the separation flow in blade-to-blade passages of the pump by monitoring the trajectory of the particles. Both LCS and vortex structure by lambda(2) can clearly demonstrates the passage blockage and flow separation under the part-load operation conditions, depicting that the separation flow occurs at blade suction side and develops from the leading edge to the main passage in the impeller.
KeywordCentrifugal pump MPANS flow separation rotating stall Lagrangian coherent structures
DOI10.1177/0957650919830188
Indexed BySCI ; EI
Language英语
WOS IDWOS:000486019900002
WOS KeywordLAGRANGIAN COHERENT STRUCTURES ; NUMERICAL-SIMULATION ; ROTATING STALL ; CAVITATION ; TURBULENCE
WOS Research AreaThermodynamics ; Engineering
WOS SubjectThermodynamics ; Engineering, Mechanical
Funding ProjectNational Key R&D Program of China[2018YFB0606101] ; National Natural Science Foundation of China[51536008] ; Beijing Natural Science Foundation[3182014] ; State Key Laboratory for Hydroscience and Engineering[sklhse-2017-E02] ; Tsinghua National Laboratory for Information Science and Technology ; Science and Technology onWater Jet Propulsion Laboratory[61422230103162223004]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Beijing Natural Science Foundation ; State Key Laboratory for Hydroscience and Engineering ; Tsinghua National Laboratory for Information Science and Technology ; Science and Technology onWater Jet Propulsion Laboratory
ClassificationQ3
Ranking3
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79959
Collection流固耦合系统力学重点实验室
Recommended Citation
GB/T 7714
Ye, WX,Luo, XW,Huang RF,et al. Investigation of flow instability characteristics in a low specific speed centrifugal pump using a modified partially averaged Navier-Stokes model[J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,2019,233(7):834-848.
APA Ye, WX,Luo, XW,黄仁芳,Jiang, ZW,Li, XJ,&Zhu, ZC.(2019).Investigation of flow instability characteristics in a low specific speed centrifugal pump using a modified partially averaged Navier-Stokes model.PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY,233(7),834-848.
MLA Ye, WX,et al."Investigation of flow instability characteristics in a low specific speed centrifugal pump using a modified partially averaged Navier-Stokes model".PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY 233.7(2019):834-848.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ye, WX]'s Articles
[Luo, XW]'s Articles
[黄仁芳]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ye, WX]'s Articles
[Luo, XW]'s Articles
[黄仁芳]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ye, WX]'s Articles
[Luo, XW]'s Articles
[黄仁芳]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.