用数值方法研究了绕流两并列方柱的气动力及其相互干扰·　使用了陈素琴等人提出的对流项用三阶逆风格式的带多重网格的改进的MAC方法,对两并列方柱的流场进行了模拟·　结果表明:两并列方柱在不同的间距比时其干扰特征有很大的不同,小间距比时出现双稳态偏流,流动并不对称于双方柱间隙的中心轴线,而是偏向其中的一个方柱· The numerical method is used to study the aerodynamic forces and the mutual interference of two parallel columns with circular flow. The improved MAC method with multiple grids using the third-order upwind scheme convection term proposed by Chen Suqin et al. The simulation results show that the bimodal square columns have different bistable characteristics when compared with each other at different spacings. Bistable bias currents occur at small spacing ratios, and the flow is not symmetrical with respect to the center axis of both column gaps. But to one of them