Experimental Investigation on Aerodynamic Performance��of Serrated Gurney Flap
Shen Xialing1, Wan Zhouying2, Gao Ge2*
1. Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics;
2. Dept. of Propulsion, Beijing University of Aeronautics and Astronautics
Abstract��
Force and PIV local flow measurements were conducted in a low speed wind tunnel to study the effectiveness of serrated Gurney flap at different deflections. The results showed that the serrated Gurney flap could significantly increase the lift coefficients and the ratio of lift to drag of the airfoil with high lift coefficients. For a given serrated Gurney flap, there was an optimum deflection, At which, the lift-drag ratio of the airfoil can increased not only at high lift coefficient but also at the low to middle angle of attack. It was also found that near-stream wise vortices shed from the serrated edges can make the flow attach to the upper surface near the trailing edge and can delay flow separation.
Shen Xialing, Wan Zhouying, Gao Ge.Experimental Investigation on Aerodynamic Performance��of Serrated Gurney Flap[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(3): 202-204
Liebeck R H. Design of subsonic airfoils for high lift [J]. J Aircraft, 1978, 5 (9):547~561
[2]
Boyd J A. Trailing edge device for an airfoil . US Patent 4542868, 1985
[3]
Bloy A W. Aerodynamic characteristics of an aerofoil with small trailing edge flaps [J]. Wind Eng, 1995, 19(3):167~172
[4]
Bloy A W. Enhanced aerofoil performance using trailing-edge flaps [J].J Aircraft.1997, 34(4):569-571
[5]
Vijgen P M H W. Serrated trailing edges for improving life and drag characteristics of lifting surfaces . NASA Case LAR-13870-1-CU, 1989
[6]
�����ܪ�PIV�ڵ��ٷ綴�е�Ӧ��[J]��������ѧʵ�������, 1998,12(2):55~62 Liu Baojie. Application of ON-LINE PIV system in low speed wind tunnel [J]. Experiments and Measurements in Fluid Mechanics, 1998,12(2):55~62 (in Chinese)
2003, Vol. 29 
