基于动态嵌套网格方法的摆动翼型粘性绕流数值模拟

该文根据摆动翼型的流场特性运用动态嵌套网格技术将其划分为不同的子区，在不同的子区中使用不同的流动控制方程，以提高计算效率.对翼型生成一个随其摆动的相对较小较密的贴体网格，在它上面采用Navier Stokes方程；对整个流场生成了一个大的相对较稀的静止背景网格，在它上面采用Euler方程.两个网格间的流场信息交换通过动态嵌套网格技术来实现.通过与单块翼型网格的计算过程和计算结果的对比分析，表明该方法在不损失计算精度的前提下计算非定常问题时具有相对较高的计算效率.

Numerical Analysis of Viscous Flow around Oscillatoring Wing Using Dynamic Chimra Grid Method

The flow field of oscillatory wing was divided into different subdomains according to its flow characteristic using the dynamic chimra grid technique. Different flow-control equations were used in different subdonmain in order to improve computing efficiency. A smaller and denser clingy grid moving along with oscillatory wing was generated in which the Naviers-Stokes equations were used, while a bigger and sparser background grid was generated for all flow field in which the Euler equations were used. Flow information communicating between two subdomains was implemented through the dynamic chimra grid technique. A numerical example shows that, for non-steady viscous flow, the adopted method is reasonable, and is more efficient than single grid with thorough Naviers-Stokes equations.