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A Parametric Study of Flapped Airfoil Lift Enhancement by Vortex Generators
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SYSNO ASEP 0368167 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title A Parametric Study of Flapped Airfoil Lift Enhancement by Vortex Generators Author(s) Součková, Natálie (UT-L)
Popelka, Lukáš (UT-L)
Matějka, M. (CZ)
Šimurda, David (UT-L) RID, ORCIDNumber of authors 4 Source Title Technical Soaring - ISSN 0744-8996
Roč. 35, č. 4 (2011), s. 125-134Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords passive flow control ; vizualizationnu ; numerical simulation Subject RIV BK - Fluid Dynamics R&D Projects 1M06031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAA2076403 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA101/08/1112 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation This paper focuses on a suppression of the flow separation, which occurs on a deflected flap, by means of vortex generators (VGs). An NACA 63A421 airfoil with a simple flap and vane-type vortex generators wasere used. The investigation was carried out by using experimental and numerical methods. The data from the numerical simulation of the flapped airfoil without VGs control were used for the vortex generator design. Two different sizes and shapes, along with various spacingsspacing of the vortex generators, were tested. The flow past the airfoil was visualized withthrough two methods, namely tuft filaments technique and oil-flow visualization. The experiments were performed in closed circuit wind tunnels with closed and open test sections. The lift curves for both cases without and with vortex generators were acquired for the determination of the lift coefficient improvement. The improvement was achieved for several cases by means all of all the applied methods. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012
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