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http://dx.doi.org/10.5139/JKSAS.2007.35.12.1059

Flow Separation Control Effects of Blowing Jet on an Airfoil  

Lee, Ki-Young (공군사관학교 기계공학과)
Chung, Heong-Seok (공군사관학교 항공우주공학과)
Cho, Dong-Hyun (공군사관학교 항공우주공학과)
Sohn, Myong-Hwan (공군사관학교 항공우주공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.12, 2007 , pp. 1059-1066 More about this Journal
Abstract
An experimental study has been conducted to investigate the flow separation control effects of a blowing jet on an elliptic airfoil at a Reynolds number of 7.84×105 based on the chord length. A blowing jet was obtained by pressing a plenum inside the airfoil and ejecting flow out of a thin jet slot that located in leading edge or trailing edge. The experimental results have shown that the blowing jet had an effect of suppressing the flow separation, resulting in the higher suction pressure distribution and higher normal force. The increase in Cn was more pronounced at higher incidence, whereas the effectiveness of the blowing jet reduced at lower incidences. The leading edge pulsating blowing with 90° was the most effective in controlling the flow separation than other types of blowing jet configuration tested in this research. Moreover, when the pulsating blowing was applied, the stall angle was postponed about 2°-3°. The continuous and pulsating blowing jet is a direct and effective flow separation control for improving the aerodynamic characteristics and performances of airfoil.
Keywords
Blowing Jet; Flow Separation Control; Aerodynamic Characteristics; Blowing Effectiveness;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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