Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions
Guo, Rong1,2; Li, Rennian1,2; Zhang, Renhui1,2; Han, Wei1,2
2019-11
Source PublicationPROCESSES
Volume7Issue:11
AbstractTo study the reasons for the low efficiency of jet centrifugal pumps (JCPs) and the mechanism of unsteady flow characteristics under multiple conditions, taking a JET750G1 JCP as the object, three-dimensional steady and unsteady numerical calculations of the model pump were carried out using the k-omega turbulence model. The transient fluctuation characteristics of the flow field in the major flow passage components and the spatial and temporal evolution laws of vortices in the rotor-stator cascades were analyzed. The accuracy of the numerical method was verified by experiments. The results show that there are various scales of flow distortion phenomena in the chamber of the JCP, such as eddies, blockage of the flow passage, recirculation, secondary flow, and circulation, which not only cause great hydraulic loss, but also destroy the flow stability, symmetry, and balance in the other flow passage components. This is an important reason for the obviously lower efficiency of a JCP compared to a general centrifugal pump. The spatial and temporal evolution laws of vortices in the rotor-stator cascades are mainly related to the relative positions of the impeller blades and guide vane blades. The formation mechanism of the unsteady flow field fluctuation characteristics of JCPs is mainly related to the number of blades in the rotor-stator cascades and the operation parameters of the pump. The fluctuation intensity of the flow field inside the impeller and guide vane is obviously greater than that in the other flow areas, reflecting that the rotor-stator interaction is the decisive factor affecting the unsteady flow characteristics of a JCP under multiple conditions.
Keywordjet centrifugal pump (JCP) unsteady flow numerical calculation pressure fluctuation rotor-stator interaction
DOI10.3390/pr7110786
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of China[51579125] ; National Key Research and Development Program of China[2016YFB0200901]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000502263700012
PublisherMDPI
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64149
Collection能源与动力工程学院
Corresponding AuthorGuo, Rong; Li, Rennian
Affiliation1.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
2.Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationColl Energy & Power Engn
Corresponding Author AffilicationColl Energy & Power Engn
First Signature AffilicationColl Energy & Power Engn
Recommended Citation
GB/T 7714
Guo, Rong,Li, Rennian,Zhang, Renhui,et al. Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions[J]. PROCESSES,2019,7(11).
APA Guo, Rong,Li, Rennian,Zhang, Renhui,&Han, Wei.(2019).Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions.PROCESSES,7(11).
MLA Guo, Rong,et al."Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions".PROCESSES 7.11(2019).
Files in This Item:
There are no files associated with this item.
Related Services
Usage statistics
Google Scholar
Similar articles in Google Scholar
[Guo, Rong]'s Articles
[Li, Rennian]'s Articles
[Zhang, Renhui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Guo, Rong]'s Articles
[Li, Rennian]'s Articles
[Zhang, Renhui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Guo, Rong]'s Articles
[Li, Rennian]'s Articles
[Zhang, Renhui]'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.