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Insights into leading edge vortex formation and detachment on a pitching and plunging flat plate

Kissing, Johannes; Kriegseis, Jochen; Li, Zhenyao; Feng, Lihao; Hussong, Jeanette; Tropea, Cameron

Abstract:
The present study is a prelude to applying different flow control devices on pitching and plunging airfoils with the intention of controlling the growth of the leading edge vortex (LEV); hence, the lift under unsteady stall conditions. As a pre-requisite the parameters influencing the development of the LEV topology must be fully understood and this constitutes the main motivation of the present experimental investigation. The aims of this study are twofold. First, an approach is introduced to validate the comparability between flow fields and LEV characteristics of two different facilities using water and air as working media by making use of a common baseline case. The motivation behind this comparison is that with two facilities the overall parameter range can be significantly expanded. This comparison includes an overview of the respective parameter ranges, control of the airfoil kinematics and careful scrutiny of how post-processing procedures of velocity data from time-resolved particle image velocimetry (PIV) influence the integral properties and topological features used to characterise the LEV development. Second, and based on results coming from both facilities, the appearance of secondary structures and their effect on LEV detachment over an extended parameter range is studied. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124677
Veröffentlicht am 08.12.2020
Originalveröffentlichung
DOI: 10.1007/s00348-020-03034-1
Scopus
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Strömungsmechanik (ISTM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2020
Sprache Englisch
Identifikator ISSN: 0723-4864, 1432-1114
KITopen-ID: 1000124677
Erschienen in Experiments in fluids
Verlag Springer
Band 61
Heft 9
Seiten Art. Nr.: 208
Vorab online veröffentlicht am 07.09.2020
Nachgewiesen in Scopus
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