Energy spectrum analysis of compressible flow based on MHz-PIV

IF 3.8 2区工程技术 Q1 ENGINEERING, MECHANICAL Acta Mechanica Sinica Pub Date : 2024-11-22 DOI:10.1007/s10409-024-24574-x

Xintao Lu (, ), Hang Zhao (, ), Xing Wei (, ), Zhen Yang (, ), Menggang Kang (, ), Hua Yang (, ), Shuang Chen (, ), Fang Zhang (, ), Qi Gao (, )

{"title":"Energy spectrum analysis of compressible flow based on MHz-PIV","authors":"Xintao Lu \n (, ), Hang Zhao \n (, ), Xing Wei \n (, ), Zhen Yang \n (, ), Menggang Kang \n (, ), Hua Yang \n (, ), Shuang Chen \n (, ), Fang Zhang \n (, ), Qi Gao \n (, )","doi":"10.1007/s10409-024-24574-x","DOIUrl":null,"url":null,"abstract":"<div><p>High-speed flows have consistently presented significant challenges to experimental research due to their complex and unsteady characteristics. This study investigates the use of the megahertz-frequency particle image velocimetry (MHz-PIV) technique to enhance time resolution under high-speed flow conditions. In our experiments, five high-speed cameras were utilized in rapid succession to capture images of the same measurement area, achieving ultra-high time resolution particle image data. Through advanced image processing techniques, we corrected optical distortions and identified common areas among the captured images. The implementation of a sliding average algorithm, along with spectral analysis of the compressible turbulent flow field based on velocity data, facilitated a comprehensive analysis. The results confirm the capability of MHz-PIV for high-frequency sampling, significantly reducing reliance on individual camera performance. This approach offers a refined measurement method with superior spatiotemporal resolution for high-speed flow experiments.\n</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":7109,"journal":{"name":"Acta Mechanica Sinica","volume":"41 9","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Mechanica Sinica","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10409-024-24574-x","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

High-speed flows have consistently presented significant challenges to experimental research due to their complex and unsteady characteristics. This study investigates the use of the megahertz-frequency particle image velocimetry (MHz-PIV) technique to enhance time resolution under high-speed flow conditions. In our experiments, five high-speed cameras were utilized in rapid succession to capture images of the same measurement area, achieving ultra-high time resolution particle image data. Through advanced image processing techniques, we corrected optical distortions and identified common areas among the captured images. The implementation of a sliding average algorithm, along with spectral analysis of the compressible turbulent flow field based on velocity data, facilitated a comprehensive analysis. The results confirm the capability of MHz-PIV for high-frequency sampling, significantly reducing reliance on individual camera performance. This approach offers a refined measurement method with superior spatiotemporal resolution for high-speed flow experiments.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics