A structured/unstructured grid generation method and its application

摘要

A hybrid structured/unstructured grid is generated by using both the advanced layer method and the advanced front method. A domain decomposition method in this hybrid grid to simulate 2-D viscous flow is discussed. The Euler equations are solved on the unstructured grid in the flow field region far from the wall, and the RNS equations are solved on the structured grid in the flow field region near the wall. Two solutions are matched on the interface of these two regions. Based on this viscous flow solver the mono-objective/bi-objective optimization and the inverse design calculation are given. Numerical results show that calculated pressure distributions of given airfoils agree well with the corresponding experimental data and performances of optimal airfoils are much better than the initial airfoils. The agreement between designed and target pressure is fine in the inverse design calculation.