Article(id=1254362831533564605, tenantId=1146029695717560320, journalId=1254119036117037056, issueId=1254362823425974931, articleNumber=null, orderNo=null, doi=10.13788/j.cnki.cbgc.2026.03.07, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1746115200000, receivedDateStr=2025-05-02, revisedDate=1755273600000, revisedDateStr=2025-08-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1776993003971, onlineDateStr=2026-04-24, pubDate=1774368000000, pubDateStr=2026-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1776993003971, onlineIssueDateStr=2026-04-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1776993003971, creator=13701087609, updateTime=1776993003971, updator=13701087609, issue=Issue{id=1254362823425974931, tenantId=1146029695717560320, journalId=1254119036117037056, year='2026', volume='48', issue='3', pageStart='1', pageEnd='190', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1776993002036, creator=13701087609, updateTime=1776993258606, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1254363899764077151, tenantId=1146029695717560320, journalId=1254119036117037056, issueId=1254362823425974931, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1254363899764077152, tenantId=1146029695717560320, journalId=1254119036117037056, issueId=1254362823425974931, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=57, endPage=71, ext={EN=ArticleExt(id=1254362833467138761, articleId=1254362831533564605, tenantId=1146029695717560320, journalId=1254119036117037056, language=EN, title=Numerical Simulation on the Effect of Central Body Position on the Flow in Cavitating Nozzles, columnId=1254362825636376902, journalTitle=Ship Engineering, columnName=Ship Design, Structure and Performance, runingTitle=null, highlight=null, articleAbstract=
[Purpose] Aiming at the problem of the impact of center body position on nozzle cavitation intensity and flow morphology,
[Method] based on the CFD-Fluent, the Mixture multiphase model is employed, the k-ε turbulence model, and the Schnerr-Sauer cavitation model, numerical simulations are performed for nozzle flow fields with varying center body positions. The validity and reliability of the methodology are confirmed through comparison with prior research results.
[Result] The nonlinear regulatory effect of the center body's axial position on the internal flow field and cavitation intensity within the nozzle is systematically quantified. It clearly identified the junction of the nozzle throat and diffuser section as the optimal position most prone to triggering cavitation effects. Cavitation intensity and mass transfer rate peaked when the center body is located at this position. Cavitation is absent on the center body when positioned inside the nozzle. When center body located outside the nozzle, the downstream extent of the cavitation zone changed minimally, and cavitation intensity gradually diminished as the center body moved further downstream. Furthermore, based on the large eddy simulation (LES) method, an in-depth analyze the complex unsteady flow structures and large-scale radial diffusion characteristics of the vapor phase downstream of the nozzle under the optimal cavitation position condition is further conducted. Significant unsteady features are observed at a location 10 nozzle diameters (10D) downstream, where the vapor phase distribution expanded radially to four times the nozzle diameter (4D).
[Conclusion] The research clarifies the regulatory mechanism of center body position on cavitation intensity, providing a theoretical basis for optimizing cavitating nozzle design. The findings contribute to enhancing the efficiency of industrial processes reliant on cavitation, such as cleaning and fragmentation, and offer theoretical support for developing adjustable center body structures to enable real-time control of cavitation intensity.
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［目的］ 针对中心体位置对喷嘴空化强度及流动形态的影响问题，
［方法］ 基于CFD-Fluent，采用Mixture多相流模型、k-ε湍流模型和Schnerr-Sauer空化模型，对不同中心体位置的喷嘴流场进行数值模拟。通过与已有研究结果对比，验证所用方法的有效性和可靠性。
［结果］ 系统量化中心体轴向位置对空化喷嘴内部流场及空化强度的非线性调控规律，明确揭示喉部与扩张锥段交界处为最易诱发空化效应的关键位置。当中心体位于该位置时，空化效应最为强烈，传质速率达到最大值；当中心体位于喷嘴内部时，中心体无空化；当中心体位于喷嘴外部时，空化区域向下游扩展的位置变化较小，且随着中心体进一步向下游移动，空化效应逐渐减弱。此外，基于LES方法进一步深入分析当喷嘴位于最佳空化位置时，喷嘴下游复杂的非稳态流动结构与蒸汽相的大尺度径向扩散特征。喷嘴下游10倍喷口直径处非稳态特征显著，蒸汽相分布直径扩张至4倍喷口直径。
［结论］ 明确中心体位置对空化强度的调控规律，为优化空化喷嘴设计提供理论依据。结果有助于提升清洗、破碎等依赖空化效应的工业过程效率，同时为开发可调中心体结构、实现空化强度实时控制提供理论支撑。
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本刊已许可中国学术期刊（光盘版）电子杂志社在中国知网及其系列数据库产品中以数字化方式复制、汇编、发行、信息网络传播本刊全文，本刊著作权使用费与本刊稿酬一并支付；本刊所刊登文章均无知识产权争议，不涉及泄露国家秘密、技术秘密或商业秘密。作者向本刊提交文章发表的行为即视为同意我编辑部上述声明，文责自负。, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=cj1RYz9wxHLQTYk7mW+8rw==, magXml=rLzjRJYoRIPostWw8HayhA==, pdfUrl=null, pdf=H2vodOyrPHjFlbUWQKtCgA==, pdfFileSize=6679067, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=SsNucYT50IEfmF8suNWhIw==, mapNumber=null, authorCompany=null, fund=null, authors=
王鑫鑫（1996—），男，硕士、助理工程师。研究方向：船舶结构。
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王鑫鑫（1996—），男，硕士、助理工程师。研究方向：船舶结构。
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王鑫鑫（1996—），男，硕士、助理工程师。研究方向：船舶结构。
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