用单调相关格式计算跨音速定常和非定常翼型绕流

 在跨音速非定常势流计算方面,人们一直在努力寻求处理包括激波运动的非线性问题的能力和计算效率的提高。Ballhaus和Goorjian（1977年）用交替方向隐式差分法（ADI）成功地直接求解了时间域的非定常跨音速小扰动方程（此法称为“LTRAN2”）。文献5]引用坐标变换也做了类似LTRAN2的工作。

CALCULATIONS OF STEADY AND UNSTEADY TRANSONIC FLOWS OVER AIRFOILS BY MONOTONE SWITH

A numerical method for calculation of two-dimensional, inviscid, steady and unsteady,small-disturbance transonic flows is presented. A monotone switch ADI algorithm is used to solve the governing equation. The a-ppropriate unsteady terms are added to the boundary conditions on body surface and wake. An analytical, asymptotic solution and the nonreflecting far-field boundary conditions are chosen for steady and unsteady case, respectively. A nonumiform mesh spacing and relatively large time-step are allowable. The developed computer program can be applied for solving both the steady and unsteady flows. Hence, it can be more efficient to use.The computational results obtained from the present method for some examples have provided a closer agreement with experimental results compared to other methods.