Correlating a High-Lift Airfoil Performance with Turbulence Strain Rate

被引：1
|
作者：
Cao, N. [1 ]
Ting, D. S-K. [1 ]
Carriveau, R. [2 ]
机构：
[1] Univ Windsor, Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada
[2] Univ Windsor, Civil & Environm Engn, 401 Sunset Ave, Windsor, ON N9B 3P4, Canada
来源：
WIND ENGINEERING | 2011年 / 35卷 / 05期
关键词：
Wakes - Lift - Airfoils - Atmospheric thermodynamics - Boundary layers - Turbulence - Wind tunnels - Angle of attack - Reynolds number;
D O I：
10.1260/0309-524X.35.5.589
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The performance of a high-lift airfoil (S1223) has been correlated to the free-stream turbulence strain rate at Reynolds numbers Re = 55,000, 75,000 and 100,000 in a wind tunnel. A comprehensive examination of the lift/drag data, wake velocity deficits, wake turbulence level and power density spectra revealed that the flow patterns above and below the airfoil are significantly altered and the boundary layer separation is delayed to higher angles of attack with increasing turbulence strain rate. That is to say, high straining turbulent wind tends to improve the airfoil performance by suppressing the stall and lowering the drag, at a small cost of a marginally reduced maximum lift coefficient.
引用
收藏
页码：589 / 606
页数：18
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