Article(id=1317484507196932857, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484499731066989, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1005-0329.2025.02.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1712678400000, receivedDateStr=2024-04-10, revisedDate=1722873600000, revisedDateStr=2024-08-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1792042384193, onlineDateStr=2026-10-15, pubDate=1740672000000, pubDateStr=2025-02-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792042384193, onlineIssueDateStr=2026-10-15, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792042384193, creator=13701087609, updateTime=1792042384193, updator=13701087609, issue=Issue{id=1317484499731066989, tenantId=1146029695717560320, journalId=1316781260334530699, year='2025', volume='53', issue='2', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='1740672000000', pubDateStr='2025-02-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1792042382414, creator='13701087609', updateTime=1792143821618, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1317909966665658876, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484499731066989, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1317909966665658877, tenantId=1146029695717560320, journalId=1316781260334530699, issueId=1317484499731066989, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=41, endPage=49, ext={EN=ArticleExt(id=1317484507419230970, articleId=1317484507196932857, tenantId=1146029695717560320, journalId=1316781260334530699, language=EN, title=Analysis of cavitation performance and vortex behavior in Helmholtz cavity under ultrasonic vibration boundary, columnId=null, journalTitle=Fluid Machinery, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To improve the working ability of Helmholtz self-excited waterjets, LES was used in the flow of the cavity using UDF dynamic grid-driven ultrasonic focusing vibration boundary, and the reliability of the model was verified by comparing the simulated and experimental values of the outlet pressure. The study explored how external ultrasonic vibration and varying frequencies influenced self-excited frequency, velocity, and cavitation. From the perspective of energy conversion, the reason for the enhanced shear characteristics inside the chamber is revealed. The vapor phase distribution in the lower chamber under various conditions was compared, and the jet performance of each section of the jet structure was analyzed. Explained the development process of periodic vortex structures under ultrasonic excitation. The results show that when the ultrasonic excitation at 25 kHz compared to ordinary jet, the natural oscillation frequency soared 3.14-fold, main frequency and amplitude became more pronounced, though jet speed marginally decreased (1.89%). Higher excitation frequencies didn't significantly curb speed. The ultrasonic excitation bolstered energy transfer and vortex feedback, intensifying shear and raising vapor phase content (0.5 ≤ y/r₂≤ 0.81) in the outlet. The ability of self-excited oscillating cavitation waterjets can be significantly improved. The research results can provide theoretical basis for the application of Helmholtz type self oscillating jet.

, authors=Bowen HOU^{1, 4}, Zhenlong FANG^{1, 2, 3}, authorsList=Bowen HOU, Zhenlong FANG, authorCompany=null, correspAuthors=Zhenlong FANG, 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=1317484507679277819, articleId=1317484507196932857, tenantId=1146029695717560320, journalId=1316781260334530699, language=CN, title=超声振动边界下亥姆赫兹腔室空化性能及涡行为分析, columnId=1317484287230853622, journalTitle=流体机械, columnName=设计计算, runingTitle=null, highlight=null, articleAbstract=

为了提升高湍流状态下亥姆赫兹式自振射流的工作能力，采用大涡模拟对由UDF动网格驱动的超声聚焦振动边界的自激振荡腔室内部的两相剪切流进行了数值仿真，并通过对比出口压力的模拟值与试验值，验证了模型的可靠性。对比分析有、无外加超声振动激励和不同激励频率对射流流动的自激频率、速度特征和空化能力的影响。从能量转化角度揭示了腔室内部剪切特性增强的原因，对、有无激励下腔室内气相的分布和射流结构的各区间射流性能进行分析，阐明了超声激励下周期性涡结构的发展过程。结果表明，相比于普通射流，当超声激励为25 kHz时，自振频率提高了3.14倍，且主频和振荡幅值更加突出，但频域性能提升致使射流速度受到最大1.89%的抑制；伴随激励频率的上升，速度受抑制趋势并不显著；超声激励的存在促进了腔室内涡结构能量传递与反馈，加剧了腔室内剪切效应，使射流出口流道（0.5 ≤ y/r₂ ≤ 0.81）范围内气相含量跃升，大幅度增强了自激振荡空化射流的能力。研究结果可为亥姆赫兹式自振射流的应用提供理论依据。

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⁴武汉理工大学 船海与能源动力工程学院，武汉 430063, bio={"content":"

侯博文（1999），男，硕士研究生，主要从事超声辅助空化射流研究，E-mail:287491396@qq.com。

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侯博文（1999），男，硕士研究生，主要从事超声辅助空化射流研究，E-mail:287491396@qq.com。

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