FLOW VISUALIZATION STUDIES OF THE MACH NUMBER EFFECTS ON DYNAMIC STALL OF AN OSCILLATING AIRFOIL

被引：31

作者：

CHANDRASEKHARA, MS

CARR, LW

机构：

[1] Naval Postgraduate School, Monterey, CA

[2] NASA Ames Research Center, Moffett Field, CA

[3] Navy-NASA Institute of Aeronautics, Monterey, CA

[4] U.S. Army ARTA, Fluid Dynamics Research Branch, Moffett Field, CA

来源：

JOURNAL OF AIRCRAFT | 1990年 / 27卷 / 06期

关键词：

Dynamic Stall - Flow Visualization Studies - Mach Number Effects - NACA 0012 Airfoil;

D O I：

10.2514/3.25313

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Compressibility effects on dynamic stall of a NACA 0012 airfoil undergoing sinusoidal oscillatory motion were studied using a stroboscopic schlieren system. Schlieren pictures and some quantitative data derived from them are presented and show the influence of freestream Mach number and reduced frequency on the dynamic stall vortex. This study shows that a dynamic stall vortex always forms and convects over the airfoil upper surface at approximately 0.3 times the freestream velocity for all cases studied. The results also demonstrate that occurrence of deep stall is delayed to higher angles of attack with increased reduced frequency, even when compressibility effects are present, but increasing Mach number alone has the opposite effect. © 1989 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

引用

页码：516 / 522

页数：7

共 13 条

[1]

Carr L.W., Progress in Analysis and Prediction of Dynamic Stall, 25, 1, pp. 6-17, (1988)

[2]

McCroskey W.J., The Phenomenon of Dynamic Stall, (1981)

[3]

Harper P.W., Flanigan R.E., The Effect of Change of Angle of Attack on the Maximum Lift of a Small Model, (1950)

[4]

Dadone L.U., Two-Dimensional Wind Tunnel Test of an Oscillating Rotor Airfoil, (1977)

[5]

Lorber P.F., Carta F.O., Unsteady Stall Penetration Experiments at High Reynolds Number, (1987)

[6]

McCroskey W.J., McAlister K.W., Carr L.W., Pucci S.L., Lambert O., Indergrand R.F., Dynamic Stall on Advanced Airfoil Sections, Journal of American Helicopter Society, pp. 45-50, (1981)

[7]

Visbal M.R., Effect of Compressibility on Dynamic Stall of a Pitching Airfoil, (1988)

[8]

Carr L.W., Platzer M.F., Chandrasekhara M.S., Ekaterinaris J.A., Experimental and Computational Studies of Dynamic Stall, (1989)

[9]

Fung K.Y., Carr L.W., An Analytical Study of Compressibility Effects on Dynamic Stall, pp. 799-805, (1988)

[10]

Carr L.W., Chandrasekhara M.S., Design and Development of a Compressible Dynamic Stall Facility, (1989)

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