Abstract: A new unstructured Cartesian cutted grid generation method is introduced. The grid generation of some airfoils and wing is performed with the tree data structure. Euler equations are solved using the cell-centred finite volume method. The results of flow field computation are in agreement with the experiments. These facts show that the grid generation and the numerical calculation approach is correct and reasonable. Based on the above work, a flow field numerical simulation of wing and store separation is finished. This process provides a new way and tool for the more accurate solver of the unsteady flow problem.

Key words: unstructured Cartesian cutted grid, tree data structure, finite volume method, store separation