TIME DOMAIN NUMERICAL-CALCULATIONS OF UNSTEADY VORTICAL FLOWS ABOUT A FLAT-PLATE AIRFOIL

被引:11
作者
HARIHARAN, SI [1 ]
YU, P [1 ]
SCOTT, JR [1 ]
机构
[1] NASA,LEWIS RES CTR,CLEVELAND,OH 44135
基金
美国国家航空航天局;
关键词
D O I
10.1016/0021-9991(92)90017-S
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A time domain numerical scheme is developed to solve for the unsteady flow about a flat plate airfoil due to imposed upstream, small amplitude, transverse velocity perturbations. The governing equation for the resulting unsteady potential is a homogeneous, constant coefficient, convective wave equation. Accurate solution of the problem requires the development of approximate boundary conditions which correctly model the physics of the unsteady flow in the far field. An accurate far field boundary condition is developed, and numerical results are presented using this condition. The stability of the scheme is discussed, and the stability restriction for the scheme is established as a function of the Mach number. Finally, comparisons are made with the frequency domain calculations by Scott and Atassi, and the relative strengths and weaknesses of each approach are assessed. © 1992.
引用
收藏
页码:419 / 430
页数:12
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