{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T20:27:26Z","timestamp":1774816046327,"version":"3.50.1"},"reference-count":52,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T00:00:00Z","timestamp":1638748800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005280","name":"Technical University of Liberec","doi-asserted-by":"publisher","award":["PURE-2020-3010"],"award-info":[{"award-number":["PURE-2020-3010"]}],"id":[{"id":"10.13039\/501100005280","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministry of Education, Youth and Sports of the Czech Republic","award":["Inter-Excellence, project No. LTAUSA19036"],"award-info":[{"award-number":["Inter-Excellence, project No. LTAUSA19036"]}]},{"name":"Institute of Thermomechanics of the Czech Academy of Sciences","award":["RVO:61388998"],"award-info":[{"award-number":["RVO:61388998"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents a very effective interference technique for the sensing and researching of compressible fluid flow in a wind tunnel facility. The developed technique is very sensitive and accurate, yet easy to use under conditions typical for aerodynamic labs, and will be used for the nonintrusive investigation of flutter in blade cascades. The interferometer employs a high-speed camera, fiber optics, and available \u201cof-the-shelf\u201d optics and optomechanics. The construction of the interferometer together with the fiber optics ensures the high compactness and portability of the system. Moreover, single-shot quantitative data processing based on introducing a spatial carrier frequency and Fourier analysis allows for almost real-time quantitative processing. As a validation case, the interferometric system was successfully applied in the research of supersonic compressible fluid discharge from a narrow channel in a wind tunnel. Density distributions were quantitatively analyzed with the spatial resolution of about 50\u00a0\u03bcm. The results of the measurement revealed important features of the flow pattern. Moreover, the measurement results were compared with Computational Fluid Dynamics (CFD) simulations with a good agreement.<\/jats:p>","DOI":"10.3390\/s21238158","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T22:18:42Z","timestamp":1638829122000},"page":"8158","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Characterization of Supersonic Compressible Fluid Flow Using High-Speed Interferometry"],"prefix":"10.3390","volume":"21","author":[{"given":"Pavel","family":"Psota","sequence":"first","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gramoz","family":"\u00c7ubreli","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"},{"name":"Faculty of Mechanical Engineering, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jind\u0159ich","family":"H\u00e1la","sequence":"additional","affiliation":[{"name":"Institute of Thermomechanics of the Czech Academy of Sciences, Dolej\u0161kova 1402\/5, 182 00 Praha, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David","family":"\u0160imurda","sequence":"additional","affiliation":[{"name":"Institute of Thermomechanics of the Czech Academy of Sciences, Dolej\u0161kova 1402\/5, 182 00 Praha, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Petr","family":"\u0160idlof","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan","family":"Kredba","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marek","family":"Sta\u0161\u00edk","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"V\u00edt","family":"L\u00e9dl","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michal","family":"Jir\u00e1nek","sequence":"additional","affiliation":[{"name":"Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentsk\u00e1 2, 461 17 Liberec, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8314-1674","authenticated-orcid":false,"given":"Martin","family":"Luxa","sequence":"additional","affiliation":[{"name":"Institute of Thermomechanics of the Czech Academy of Sciences, Dolej\u0161kova 1402\/5, 182 00 Praha, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan","family":"Lepicovsky","sequence":"additional","affiliation":[{"name":"Institute of Thermomechanics of the Czech Academy of Sciences, Dolej\u0161kova 1402\/5, 182 00 Praha, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106029","DOI":"10.1016\/j.ijthermalsci.2019.106029","article-title":"Development and application of spatial carrier interferometry for whole field real-time investigation of temperatures in liquid media","volume":"145","author":"Psota","year":"2019","journal-title":"Int. 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