Article(id=1320456306360696969, tenantId=1146029695717560320, journalId=1301849854269554754, issueId=1320176652034880125, articleNumber=null, orderNo=null, doi=10.11729/syltlx20230144, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1698681600000, receivedDateStr=2023-10-31, revisedDate=1702310400000, revisedDateStr=2023-12-12, acceptedDate=1702915200000, acceptedDateStr=2023-12-19, onlineDate=1792750916327, onlineDateStr=2026-10-23, pubDate=1777046400000, pubDateStr=2026-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792750916327, onlineIssueDateStr=2026-10-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792750916327, creator=13701087609, updateTime=1792750916327, updator=13701087609, issue=Issue{id=1320176652034880125, tenantId=1146029695717560320, journalId=1301849854269554754, year='2026', volume='40', issue='2', pageStart='1', pageEnd='124', issueExtLink='null', onlineDate='null', pubDate='1777046400000', pubDateStr='2026-04-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792684241540, creator='13701087609', updateTime=1792684241540, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=40, endPage=49, ext={EN=ArticleExt(id=1320456306528469130, articleId=1320456306360696969, tenantId=1146029695717560320, journalId=1301849854269554754, language=EN, title=Study on MHz high-speed PIV technique, columnId=1301954871368904982, journalTitle=Journal of Experiments in Fluid Mechanics, columnName=Measuring Technique, runingTitle=null, highlight=null, articleAbstract=
Transonic flows have presented an enduring challenge to experimental research due to their intricate and unsteady flow characteristics. This study investigated the megahertz-frequency Particle Image Velocimetry (MHz–PIV) technique to enhance the resolution of small time-scale flows under the transonic flow conditions. During the measurement, five high-speed cameras alternately and quickly captured images of the same measurement area, and thus obtained ultra-high time resolution particle image data. By employing image processing techniques, optical distortion correction and identification of the common area were achieved. The application of the ensemble correlation algorithm, coupled with spectral analysis of the compressible turbulent flow field based on the velocity field, contributed to a comprehensive analysis. The experiment validated the high-frequency sampling capability of MHz–PIV, which significantly reduces the technology’s dependence on camera performance. This approach offers a refined measurement technique with high spatiotemporal resolution for transonic experiments.
, authors=Xintao LU
1, Hang ZHAO
1, Wenxuan SHE
1, Han TU
2, 1, Qi GAO
1, *, Runjie WEI
3, Fang ZHANG
4, Shuang Chen
5, authorsList=Xintao LU, Hang ZHAO, Wenxuan SHE, Han TU, Qi GAO, Runjie WEI, Fang ZHANG, Shuang Chen, authorCompany=null, correspAuthors=Qi GAO, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 Journal of Experiments in Fluid Mechanics. All rights reserved., 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=1320456316527689962, articleId=1320456306360696969, tenantId=1146029695717560320, journalId=1301849854269554754, language=CN, title=MHz高速PIV实验技术研究, columnId=1301954871549260056, journalTitle=实验流体力学, columnName=测量技术, runingTitle=null, highlight=null, articleAbstract=
跨声速流动因其复杂的非定常流动特性,一直是实验研究中的一大难题。为了较好地解析亚跨超声速流动中的小时间尺度流动,本文研究了MHz频率的粒子图像测速技术(Particle Image Velocimetry, PIV)。在跨声速射流场的实验测量中,利用5台高速相机对同一测量区域进行交替快速拍摄,获得了超高时间分辨率的粒子图像数据。通过图像处理技术,完成了图像的光学畸变修正和公共区域识别。应用Ensemble correlation互相关算法,基于速度场结果,完成了可压缩湍流场的能谱解析。实验结果表明,MHz–PIV具有高频采样能力,极大地降低了高频采样技术对相机性能的依赖性,为跨声速实验提供了一种具有高时空分辨率的精细测量技术。
, authors=鲁鑫涛
1, 赵航
1, 佘文轩
1, 涂晗
2, 1, 高琪
1, *, 魏润杰
3, 张放
4, 陈爽
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鲁鑫涛(1999—),男,浙江余姚人,博士研究生。研究方向:实验流体力学。E-mail:luxtzju@163.comluxtzju@163.com
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鲁鑫涛(1999—),男,浙江余姚人,博士研究生。研究方向:实验流体力学。E-mail:luxtzju@163.comluxtzju@163.com
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2School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China
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2武汉工程大学 机电工程学院,武汉 430205
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Jet nozzle and tracer particle injection system, figureFileSmall=9oQGzD0uZozRLw8n9ew8eg==, figureFileBig=YZWeHpbgRDNcvLTdhZcoxQ==, tableContent=null), ArticleFig(id=1320456323511206192, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图1, caption=
射流喷管及示踪粒子投放系统, figureFileSmall=9oQGzD0uZozRLw8n9ew8eg==, figureFileBig=YZWeHpbgRDNcvLTdhZcoxQ==, tableContent=null), ArticleFig(id=1320456323708338481, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.2, caption=
MHz–PIV experimental platform, figureFileSmall=XfAppxtPiDxQ/lHb9Njcgg==, figureFileBig=7pHPXka8vGuxn0uN8E1CVg==, tableContent=null), ArticleFig(id=1320456323775447346, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图2, caption=
MHz–PIV实验台, figureFileSmall=XfAppxtPiDxQ/lHb9Njcgg==, figureFileBig=7pHPXka8vGuxn0uN8E1CVg==, tableContent=null), ArticleFig(id=1320456323926442291, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.3, caption=
Camera timing diagram, figureFileSmall=ICjmto1OQJlwIZnXvFrPHg==, figureFileBig=AoCs7DUricKbAsU2RamvNw==, tableContent=null), ArticleFig(id=1320456324001939764, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图3, caption=
相机时序图, figureFileSmall=ICjmto1OQJlwIZnXvFrPHg==, figureFileBig=AoCs7DUricKbAsU2RamvNw==, tableContent=null), ArticleFig(id=1320456324098408757, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.4, caption=
Pixel coordinate system and world coordinate system in the calibration image, figureFileSmall=qUQMi2KdKyiVQvEWrvDyxw==, figureFileBig=lSwNQvkZqrFfA0PpTRodig==, tableContent=null), ArticleFig(id=1320456324182294838, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图4, caption=
标定图像中的像素坐标系及世界坐标系, figureFileSmall=qUQMi2KdKyiVQvEWrvDyxw==, figureFileBig=lSwNQvkZqrFfA0PpTRodig==, tableContent=null), ArticleFig(id=1320456324257792311, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.5, caption=
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公共区域识别提取算法效果示意, figureFileSmall=vGp7sErE42x2ljwC7IF2kA==, figureFileBig=i8PIrJsbiVlGHaTlH5C6zg==, tableContent=null), ArticleFig(id=1320456324387815737, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.6, caption=
Schematic diagram of Ensemble correlation algorithm adapted from Meinhart et al[32], figureFileSmall=CQCCt33G1v1XrB4CSnUeog==, figureFileBig=ubJE4Z+tNeDA5AO3CIVSpw==, tableContent=null), ArticleFig(id=1320456324463313210, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图6, caption=
Ensemble correlation算法图解摘自Meinhart 等[32], figureFileSmall=CQCCt33G1v1XrB4CSnUeog==, figureFileBig=ubJE4Z+tNeDA5AO3CIVSpw==, tableContent=null), ArticleFig(id=1320456324534616379, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.7, caption=
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不同输入图片数对应的特定点平均速度, figureFileSmall=jF4v6sUtiwZZNX1474fWLw==, figureFileBig=BAmamoKhPp+7/App+gS2Aw==, tableContent=null), ArticleFig(id=1320456324673028413, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.8, caption=
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The pre-multiplication spectrum validating the −1 power-law, figureFileSmall=g/9MpsA+ZpRPG6khaFbwwA==, figureFileBig=+ATu3bGD13c5E/sHcqZqZg==, tableContent=null), ArticleFig(id=1320456324865966400, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图9, caption=
各工况预乘谱验证−1幂次率, figureFileSmall=g/9MpsA+ZpRPG6khaFbwwA==, figureFileBig=+ATu3bGD13c5E/sHcqZqZg==, tableContent=null), ArticleFig(id=1320456324962435393, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Fig.10, caption=
Verification of the source of the main frequency introduction, figureFileSmall=4IOdDHldbU8WLH8DI2wY7A==, figureFileBig=Q08yZmAWsIVMMnEHseJyVQ==, tableContent=null), ArticleFig(id=1320456325037932866, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=CN, label=图10, caption=
主频引入源验证, figureFileSmall=4IOdDHldbU8WLH8DI2wY7A==, figureFileBig=Q08yZmAWsIVMMnEHseJyVQ==, tableContent=null), ArticleFig(id=1320456325109236035, tenantId=1146029695717560320, journalId=1301849854269554754, articleId=1320456306360696969, language=EN, label=Table 1, caption=
Comparison of distortion degree between original image and corrected image
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| 图片编号 | 原图/像素 | 矫正图像/像素 | 矫正量/% |
|---|
| 1 | 1.4910 | 0.2349 | 84.25 |
| 2 | 1.6778 | 0.2204 | 86.86 |
| 3 | 2.4933 | 0.2448 | 90.18 |
| 4 | 0.7828 | 0.1360 | 82.63 |
| 5 | 0.3247 | 0.0545 | 83.21 |
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原图与畸变矫正后图像的畸变程度对比
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| 图片编号 | 原图/像素 | 矫正图像/像素 | 矫正量/% |
|---|
| 1 | 1.4910 | 0.2349 | 84.25 |
| 2 | 1.6778 | 0.2204 | 86.86 |
| 3 | 2.4933 | 0.2448 | 90.18 |
| 4 | 0.7828 | 0.1360 | 82.63 |
| 5 | 0.3247 | 0.0545 | 83.21 |
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