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Leading edge vortex formation and detachment on a flat plate undergoing simultaneous pitching and plunging motion: Experimental and computational study

Kissing, J.; Wegt, S.; Jakirlic, S.; Kriegseis, Jochen; Hussong, J.; Tropea, C.

Abstract:
This study focuses on the formation and detachment of a leading edge vortex (LEV) appearing on an airfoil when its effective angle of attack is dynamically changed, inducing additional forces and moments on the airfoil. Experimental measurements of the time-resolved velocity field using Particle Image Velocimetry (PIV) are complemented by a computational study using an URANS (Unsteady Reynolds-Averaged Navier–Stokes) framework. In this framework a transition-sensitive Reynolds-stress model of turbulence, proposed by Maduta et al. (2018), which combines the near-wall Reynolds-Stress model by Jakirlic and Maduta (2015) and a phenomenological transition model governing the pre-turbulent kinetic energy by Walters and Cokljat (2008), is employed. Combined pitching and plunging kinematics of the investigated flat plate airfoil enable the effective inflow angle to be arbitrarily prescribed. A qualitative assessment of flow fields and a quantitative comparison of LEV characteristics in terms of its center position and circulation as well as an investigation of the mechanism causing the vortex to stop accumulating circulation revealed close agreement between the experimental and simulation results. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000126011
Veröffentlicht am 16.11.2020
Originalveröffentlichung
DOI: 10.1016/j.ijheatfluidflow.2020.108726
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Strömungsmechanik (ISTM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0142-727X, 1879-2278
KITopen-ID: 1000126011
Erschienen in International journal of heat and fluid flow
Band 86
Seiten Art.-Nr.: 108726
Schlagwörter Unsteady aerodynamics; Leading edge vortex (LEV); URANS; TR-PIV
Nachgewiesen in Scopus
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