Flow mechanism and axial force distribution characteristics of multistage pump cavity

The gap leakage between the impeller ring leads to the change of the pump cavity flow characteristics, resulting in the uneven pressure distribution of shroud, which causes the axial force of the cavity to change. In this paper, the flow in the front and the rear cavity of the multistage centrifugal...

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Veröffentlicht in:Science progress (1916) 2022-10, Vol.105 (4), p.368504221145575-368504221145575
Hauptverfasser: Chen, Qian, Huan, Yang Li, Peng, Qi Zhi, Xin, Yang Cong, Hui, Niu Chen
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Huan, Yang Li
Peng, Qi Zhi
Xin, Yang Cong
Hui, Niu Chen
description The gap leakage between the impeller ring leads to the change of the pump cavity flow characteristics, resulting in the uneven pressure distribution of shroud, which causes the axial force of the cavity to change. In this paper, the flow in the front and the rear cavity of the multistage centrifugal pump was taken as the research object. Through the numerical method, the radial flow velocity, the leakage flow size and its direction, the core zone rotation factor of the front and the rear cavity of the multistage pump impeller at all stages and the axial force of pump cavity were studied. The results show that the leakage in the front cavity of multistage pump impeller at all stages flows inward along radial direction (i.e. it flows from the inlet of pump cavity to the front ring clearance). The rotation factor in core zone is higher than 0.5, and with the increase of rotation factor, the axial force of the front pump cavity increased. The leakage in the rear pump cavity flows outward along radial direction (i.e. it flows from the rear ring to the inlet of pump cavity). The rotation factor in core zone is less than 0.5, and with the increase of rotation factor, the axial force decreased gradually. Besides, the radial velocity and rotation factor in the front and the rear multistage pump of impellers were obviously along the axial direction at three regions, the regions are pump case boundary layer, core zone and impeller boundary layer. The flow in the core zone is dominated by circumferential circular motion, and the radial velocity in the core zone is 0. It is shown that the direction of the leakage in the pump cavity and the rotation effect of the flow micelle in the mainstream core zone are the main factors affecting the axial force of the pump cavity, and the research results can provide theoretical guidance for the calculation and suppression of axial force of multistage pumps.
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In this paper, the flow in the front and the rear cavity of the multistage centrifugal pump was taken as the research object. Through the numerical method, the radial flow velocity, the leakage flow size and its direction, the core zone rotation factor of the front and the rear cavity of the multistage pump impeller at all stages and the axial force of pump cavity were studied. The results show that the leakage in the front cavity of multistage pump impeller at all stages flows inward along radial direction (i.e. it flows from the inlet of pump cavity to the front ring clearance). The rotation factor in core zone is higher than 0.5, and with the increase of rotation factor, the axial force of the front pump cavity increased. The leakage in the rear pump cavity flows outward along radial direction (i.e. it flows from the rear ring to the inlet of pump cavity). The rotation factor in core zone is less than 0.5, and with the increase of rotation factor, the axial force decreased gradually. Besides, the radial velocity and rotation factor in the front and the rear multistage pump of impellers were obviously along the axial direction at three regions, the regions are pump case boundary layer, core zone and impeller boundary layer. The flow in the core zone is dominated by circumferential circular motion, and the radial velocity in the core zone is 0. It is shown that the direction of the leakage in the pump cavity and the rotation effect of the flow micelle in the mainstream core zone are the main factors affecting the axial force of the pump cavity, and the research results can provide theoretical guidance for the calculation and suppression of axial force of multistage pumps.</description><identifier>ISSN: 0036-8504</identifier><identifier>EISSN: 2047-7163</identifier><identifier>DOI: 10.1177/00368504221145575</identifier><identifier>PMID: 36573792</identifier><language>eng</language><publisher>London, England: SAGE Publications</publisher><subject>Axial flow pumps ; Axial forces ; Boundary layers ; Cavity flow ; Centrifugal pumps ; Flow characteristics ; Flow velocity ; Force distribution ; Impellers ; Leakage ; Mathematical models ; Micelles ; Numerical methods ; Original Manuscript ; Pressure distribution ; Radial flow ; Radial velocity ; Rotation ; Velocity</subject><ispartof>Science progress (1916), 2022-10, Vol.105 (4), p.368504221145575-368504221145575</ispartof><rights>The Author(s) 2022</rights><rights>2022. 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In this paper, the flow in the front and the rear cavity of the multistage centrifugal pump was taken as the research object. Through the numerical method, the radial flow velocity, the leakage flow size and its direction, the core zone rotation factor of the front and the rear cavity of the multistage pump impeller at all stages and the axial force of pump cavity were studied. The results show that the leakage in the front cavity of multistage pump impeller at all stages flows inward along radial direction (i.e. it flows from the inlet of pump cavity to the front ring clearance). The rotation factor in core zone is higher than 0.5, and with the increase of rotation factor, the axial force of the front pump cavity increased. The leakage in the rear pump cavity flows outward along radial direction (i.e. it flows from the rear ring to the inlet of pump cavity). The rotation factor in core zone is less than 0.5, and with the increase of rotation factor, the axial force decreased gradually. Besides, the radial velocity and rotation factor in the front and the rear multistage pump of impellers were obviously along the axial direction at three regions, the regions are pump case boundary layer, core zone and impeller boundary layer. The flow in the core zone is dominated by circumferential circular motion, and the radial velocity in the core zone is 0. It is shown that the direction of the leakage in the pump cavity and the rotation effect of the flow micelle in the mainstream core zone are the main factors affecting the axial force of the pump cavity, and the research results can provide theoretical guidance for the calculation and suppression of axial force of multistage pumps.</description><subject>Axial flow pumps</subject><subject>Axial forces</subject><subject>Boundary layers</subject><subject>Cavity flow</subject><subject>Centrifugal pumps</subject><subject>Flow characteristics</subject><subject>Flow velocity</subject><subject>Force distribution</subject><subject>Impellers</subject><subject>Leakage</subject><subject>Mathematical models</subject><subject>Micelles</subject><subject>Numerical methods</subject><subject>Original Manuscript</subject><subject>Pressure distribution</subject><subject>Radial flow</subject><subject>Radial velocity</subject><subject>Rotation</subject><subject>Velocity</subject><issn>0036-8504</issn><issn>2047-7163</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>AFRWT</sourceid><recordid>eNp1kU9P3DAQxa0KVLbAB-gFWeLSS7b-b-eE0KotlZB6gbM1cRwwSuLFTqB8e7xa2Jainix7fvPG7w1CnylZUqr1V0K4MpIIxigVUmr5AS0YEbrSVPE9tNjUqw1wgD7lfEcIlVSZj-iAK6m5rtkCXX_v4yMevLuFMeQBw9hi-B2gx11MzuM25CmFZp5CHHGBErjJp_IYXMaxw8PcT-UGNx6v52GNHTyE6ekI7XfQZ3_8ch6WOd-uVhfV5a8fP1fnl5UTtJ6q1kBjhJMdM4poT0VTC-abGozh0AnNFTBpGgWaOZCdU4ID86JlivDipOWH6Gyru56bwbfOj1OC3q5TGCA92QjBvq2M4dbexAdLiSix1KYofHlRSPF-9nmyQ8jO9z2MPs7ZMi2N1NooXdDTf9C7OKex-NtSpmRLC0W3lEsx5-S73W8osZut2XdbKz0nf9vYdbyuqQDLLZBL0H_G_l_xGd54oFQ</recordid><startdate>20221001</startdate><enddate>20221001</enddate><creator>Chen, Qian</creator><creator>Huan, Yang Li</creator><creator>Peng, Qi Zhi</creator><creator>Xin, Yang Cong</creator><creator>Hui, Niu Chen</creator><general>SAGE Publications</general><general>Sage Publications Ltd</general><scope>AFRWT</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JQ2</scope><scope>K9.</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0003-1442-7649</orcidid></search><sort><creationdate>20221001</creationdate><title>Flow mechanism and axial force distribution characteristics of multistage pump cavity</title><author>Chen, Qian ; Huan, Yang Li ; Peng, Qi Zhi ; Xin, Yang Cong ; Hui, Niu Chen</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-d8ab84c5f28607e14b942eb9a883af4736a258b6a72ca5fc643a2e4d2603516d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Axial flow pumps</topic><topic>Axial forces</topic><topic>Boundary layers</topic><topic>Cavity flow</topic><topic>Centrifugal pumps</topic><topic>Flow characteristics</topic><topic>Flow velocity</topic><topic>Force distribution</topic><topic>Impellers</topic><topic>Leakage</topic><topic>Mathematical models</topic><topic>Micelles</topic><topic>Numerical methods</topic><topic>Original Manuscript</topic><topic>Pressure distribution</topic><topic>Radial flow</topic><topic>Radial velocity</topic><topic>Rotation</topic><topic>Velocity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Qian</creatorcontrib><creatorcontrib>Huan, Yang Li</creatorcontrib><creatorcontrib>Peng, Qi Zhi</creatorcontrib><creatorcontrib>Xin, Yang Cong</creatorcontrib><creatorcontrib>Hui, Niu Chen</creatorcontrib><collection>Sage Journals GOLD Open Access 2024</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology &amp; Engineering</collection><collection>Engineering Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Science progress (1916)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Qian</au><au>Huan, Yang Li</au><au>Peng, Qi Zhi</au><au>Xin, Yang Cong</au><au>Hui, Niu Chen</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Flow mechanism and axial force distribution characteristics of multistage pump cavity</atitle><jtitle>Science progress (1916)</jtitle><addtitle>Sci Prog</addtitle><date>2022-10-01</date><risdate>2022</risdate><volume>105</volume><issue>4</issue><spage>368504221145575</spage><epage>368504221145575</epage><pages>368504221145575-368504221145575</pages><issn>0036-8504</issn><eissn>2047-7163</eissn><abstract>The gap leakage between the impeller ring leads to the change of the pump cavity flow characteristics, resulting in the uneven pressure distribution of shroud, which causes the axial force of the cavity to change. In this paper, the flow in the front and the rear cavity of the multistage centrifugal pump was taken as the research object. Through the numerical method, the radial flow velocity, the leakage flow size and its direction, the core zone rotation factor of the front and the rear cavity of the multistage pump impeller at all stages and the axial force of pump cavity were studied. The results show that the leakage in the front cavity of multistage pump impeller at all stages flows inward along radial direction (i.e. it flows from the inlet of pump cavity to the front ring clearance). The rotation factor in core zone is higher than 0.5, and with the increase of rotation factor, the axial force of the front pump cavity increased. The leakage in the rear pump cavity flows outward along radial direction (i.e. it flows from the rear ring to the inlet of pump cavity). The rotation factor in core zone is less than 0.5, and with the increase of rotation factor, the axial force decreased gradually. Besides, the radial velocity and rotation factor in the front and the rear multistage pump of impellers were obviously along the axial direction at three regions, the regions are pump case boundary layer, core zone and impeller boundary layer. The flow in the core zone is dominated by circumferential circular motion, and the radial velocity in the core zone is 0. It is shown that the direction of the leakage in the pump cavity and the rotation effect of the flow micelle in the mainstream core zone are the main factors affecting the axial force of the pump cavity, and the research results can provide theoretical guidance for the calculation and suppression of axial force of multistage pumps.</abstract><cop>London, England</cop><pub>SAGE Publications</pub><pmid>36573792</pmid><doi>10.1177/00368504221145575</doi><orcidid>https://orcid.org/0000-0003-1442-7649</orcidid><oa>free_for_read</oa></addata></record>
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subjects Axial flow pumps
Axial forces
Boundary layers
Cavity flow
Centrifugal pumps
Flow characteristics
Flow velocity
Force distribution
Impellers
Leakage
Mathematical models
Micelles
Numerical methods
Original Manuscript
Pressure distribution
Radial flow
Radial velocity
Rotation
Velocity
title Flow mechanism and axial force distribution characteristics of multistage pump cavity
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