Applications of the patched-grid technology in numerical simulation of flowfield

In this paper, the transonic flow of Wing/Body/Pylon/Nacelle configuration is simulated by solving Navier-Stokes equations based on structural patched-grid with Menter SST turbulence model. The result is compared with wind tunnel experimental data and the result computed by l to l multi-block structural grid. It is proved that patched-grid technology is reliable and efficient. At the same time, interpolation method which influences the simulation is also studied for selection of an appropriate method. At last three basic laws are studied by comparing the result of different patch grids. It is proved that patched-grid can greatly reduce the number of the grids and make the distribution of the grid node freer. By using patched-grid the computation time is shortened and the efficiency is improved, at the same time the engineering precision is fulfilled in both the global force coefficient and the local pressure and streamline of the flow field.