Research on release of airborne weapon based on dynamic chimera grid technique

In order to study the aerodynamic interference and movement rules of external stores, computational fluid dynamics (CFD) methods were used to simulate the release process of airborne weapons in R/S UAV.Combined with 6-DOF kinetic equations, the dynamic chimera grid approach was used to realize the bomb's movement simulation, and the generalized minimal residual method (GMRES) was introduced to solve unsteady Euler equations. All major parameters, such as displacement, angular orientations and forces, and their change trends were obtained. The results show that the effect of aerodynamic interference caused by release is only significant at its beginning, and almost negligible with the increase of the distance between the aircraft and the external stores.