高雷诺数情况下钝体绕流的数值模拟

Numerical simulation of flow around a bluff body at high Reynolds number

在高雷诺数 (Re=1× 1 0 4)情况下 ,利用流函数———涡量法在二维空间对半圆半椭圆的拼接体 (新月形覆冰导线的截面 )绕流流场的流动结构、涡的变化及气动力特性进行数值模拟 .将模拟过程用于圆柱体和半圆半椭圆拼接体 ,结果与前人的研究结果及试验值相吻合 。

The flow around a bluff body, being a mixture structure of semi cylinder and semi ellipsoid, was simulated at high Reynolds number ( Re =1×10 4). The stream function vorticity formulation in two dimension was employed to get aerodynamics characteristics of the bluff body. The numerical results are in good agreement with the experiment results. It proves that the numerical simulation of this structure is feasible.