Spectral characteristics of turbulent boundary layers – comparison of Particle Image Velocimetry and Thermal Anemometry

0518108 - ÚT 2020 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Jurčáková, Klára - Kellnerová, Radka - Procházka, Pavel P. - Antoš, Pavel
Spectral characteristics of turbulent boundary layers – comparison of Particle Image Velocimetry and Thermal Anemometry.
EPJ Web of Conferences. Paris: EDP Sciences, 2019, č. článku 02034. 213. E-ISSN 2100-014X.
[EFM18 - Experimental Fluid Mechanics 2018. Prague (CZ), 13.11.2018-16.11.2018]
Grant CEP: GA ČR(CZ) GA18-09539S; GA ČR(CZ) GA15-18964S
Institucionální podpora: RVO:61388998
Klíčová slova: wind tunnel * rough surface * attached-eddy hypthesis
Obor OECD: Mechanical engineering
https://www.epj-conferences.org/articles/epjconf/pdf/2019/18/epjconf_efm18_02034.pdf

Flow in turbulent boundary layers over various rough surfaces was measured by the time-resolved particle image velocimetry and the thermal anemometry. The experimental methods showed very good agreement in both mean and spectral characteristics taking into account each method limitations. The spectral characteristics supported the attached eddy hypothesis. The most energetic structures were growing with the wall-normal distance and they achieved sizes equal to 3 to 8 boundary layer depths.
Trvalý link: http://hdl.handle.net/11104/0304495