Numerical simulation of external flow interfered by jet flow

A numerical method is discussed for the simulation of the external flow field interfered by the trust vectoring flow. Three contents are included which are: the combination of chimera grid technique and matching grid technique, the turbulence model which is suitable for the flow field with complicated configuration, and the boundary condition of jet flow with or without inner flow. The numerical method was used for the simulation of the flow filed of three models: the interfered flow field with inner flow, the interfered flow field with a jet flow boundary only, and the aircraft flow field with the interference of jet flow. The external flow fields and aerodynamic forces of different configurations interfered by the jet flow are calculated. It is confirmed that using combined grids and proper turbulence model, the complicated flow fields of external flow with jet flow can be analyzed.