Article(id=1317484286970806772, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484285729297022, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2025.01.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1704816000000, receivedDateStr=2024-01-10, revisedDate=1715011200000, revisedDateStr=2024-05-07, acceptedDate=null, acceptedDateStr=null, onlineDate=1792042331688, onlineDateStr=2026-10-15, pubDate=1738166400000, pubDateStr=2025-01-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792042331688, onlineIssueDateStr=2026-10-15, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792042331688, creator=13701087609, updateTime=1792042331688, updator=13701087609, issue=Issue{id=1317484285729297022, tenantId=1146029695717560320, journalId=1316781260334530699, year='2025', volume='53', issue='1', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1738166400000', pubDateStr='2025-01-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792042331392, creator='13701087609', updateTime=1792143991750, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1317910680238411814, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484285729297022, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1317910680238411815, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484285729297022, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=25, endPage=32, ext={EN=ArticleExt(id=1317484287155356149, articleId=1317484286970806772, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=The investigation of flow characteristics in Roots vacuum pump with internal return cavity, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

In order to solve gas dynamic noise of Roots vacuum pump due to gas pulsation, return cavity models of four different structures, such as constant rectangular, expanding rectangular, constant depth arc and expanding arc cavities, were designed. The effects of return cavity structure on exhaust pressure, flow rate and internal flow field were analyzed by using the RNG k- εturbulence model and dynamic mesh method, and were verified by experiment. The research results show that the return cavity can increase the pressure of primitives volume in the pump chamber, which effectively suppresses high-pressure gas backflow and improve pressure and flow fluctuation at the outlet. Meanwhile, it can cause lower volumetric flow at inlet. When the inlet pressure is 30~76 kPa, compared with other three return cavities, the fluctuation amplitude of exhaust pressure and flow rate are the lowest at the outlet of constant depth rectangular return cavity (1.31~6.97 kPa and 0.39~1.48 m³/s, respectively). The research results can provide a theoretical basis for noise reduction and structural optimization of the Roots vacuum pump.

, authors=Jianting LIU^{1, 2}, Yang LI^{1, 2}, Xiaopei LI^{1, 2}, Haiqiang LI^{1, 2}, authorsList=Jianting LIU, Yang LI, Xiaopei LI, Haiqiang LI, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1317484287415402999, articleId=1317484286970806772, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=内设回流槽的罗茨真空泵流动特性研究, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=

针对罗茨真空泵因排气脉动引起的气体动力性噪声问题，设计等深矩形、渐扩矩形、等深弧形、渐扩弧形4种不同结构的回流槽模型，运用RNG k-ε湍流模型和动网格技术分析回流槽结构对排气压力、流量及内部流场的影响，并通过试验对模型进行验证。研究结果表明，回流槽结构可提高泵腔内基元容积的压力，有效抑制出口处高压气体返流，改善排气侧压力和流量波动，但同时会引起进口流量减小；当入口压力为30~76 kPa时，与其他3种回流槽相比，等深矩形回流槽的排气压力和流量的波动幅度最小，分别为1.31~6.97 kPa和0.39~1.48 m³/s。研究结果可为罗茨真空泵降噪的结构设计优化提供理论依据。

, authors=刘建停^{1, 2}, 李杨^{1, 2}, 李晓配^{1, 2}, 李海强^{1, 2}, authorsList=刘建停, 李杨, 李晓配, 李海强, authorCompany=null, correspAuthors=null, authorNote=, correspAuthorsNote=null, copyrightStatement=作者向本刊所投稿件一经本刊录用，则该论文的复制权、发行权、信息网络传播权、翻译权、汇编权等权利视为自动转让给本刊。本刊为国内各主要数据库收录期刊，本刊所发表的稿件将同时通过互联网进行网络出版或提供信息服务。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=/OatdVmwPmcbGDvWf03c8A==, magXml=T52nq+QkrDK/qbTPFIsSkg==, pdfUrl=null, pdf=g7ZI3wh3ochUHqHiV+XsdQ==, pdfFileSize=4827302, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=uG/xFYs6fPtgw4hg+Wfh/w==, mapNumber=null, fund=null)}, authors=[Author(id=1317484289336394239, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1317484286970806772, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=2863690696@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1317484289441251842, tenantId=1146029695717560320, journalId=1316781260334530699, articleId=1317484286970806772, authorId=1317484289336394239, language=EN, stringName=Jianting LIU, firstName=Jianting, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=^{1, 2}, address=¹Jiangsu XCMG Construction Machinery Research Institute Co., Ltd., Xuzhou 221001, China
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刘建停（1996），男，硕士研究生，主要从事旋转机械内部流动特性研究，通信地址：221004 江苏省徐州市鼓楼区金山桥街道荆山路徐工集团工程机械研究院有限公司，E-mail:2863690696@qq.com。

"}, bioImg=null, bioContent=

刘建停（1996），男，硕士研究生，主要从事旋转机械内部流动特性研究，通信地址：221004 江苏省徐州市鼓楼区金山桥街道荆山路徐工集团工程机械研究院有限公司，E-mail:2863690696@qq.com。

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