| Enhancement of Airfoil Post-Stall Characteristics via a Jet Blowing |
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Ki-Young Lee, Heong-Seok Chung, Dong-Hyun Cho, Myong-Hwan Sohn |
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| 제트 블로잉에 의한 에어포일의 실속후 특성 향상 |
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이기영, 정형석, 조동현, 손명환 |
1공군사관학교 기계공학과
2공군사관학교 항공우주공학과 |
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| Abstract |
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Active flow control, in the form of steady and unsteady momentum injection via jet blowing was studied. A jet was obtained by pressing a plenum inside the airfoil and ejecting flow out of a thin slot. The normal and drag forces were measured with leading edge or trailing edge blowing Jet and compared with the results obtained with no blowing. The blowing jet has been shown to improve the aerodynamic performance of the airfoil. The steady jet proved more effective than pulsating jet in these experimental conditions. Furthermore for the case of leading edge steady blowing jet, the alleviation of non-linearity in the normal force curve slope can be seen at higher angles of attack. No effective trailing edge jet was observed in this highly separated flow. This shows that the stall control is highly depends on the characteristics of the boundary layer near the jet slot. |
| Key Words:
Jet Blowing, Post-Stall, Active Flow Control, Boundary Layer Separation, Aerodynamic Characteristics |
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