Airborne Numerical Simulation Of Multi-barrel Rocket Impact

Fluent software is developed to simulate the complex flow field of the airborne multi-tube rocket jet impingement in this paper. The main works are as follows:The physical and mathematics models of the multi-tube rocket are established, and the control equations of the unsteady turbulent flow of the jet impingement flow are described. Through analyzing the function of different turbulent models and range of application, the rational turbulent model is selected, to which the discrete treatment is applied with Finite Volume Method (FVM).Considering movement of the rocket, the paper studies the technique of Dynamic mesh, explains its principle and method of creation, perfectly solves the problem of continuous shape and twist of mesh in study region which caused by the rocket's movement, and works out User-Define Function (UDF). Because of the complexity of wave in the flow fields, the technique of adaptive mesh is used in numerical simulation. The results have shown its superiority.According to the rocket movement, the dynamic and static numerical simulation of 2-D and 3-D models is carried out respectively. Based on the different positions of the rocket, the paper studies impingement influence of the jet flow to the launcher, obtains the distributions of the flow parameter internal and external of the launcher.Finally, the paper simulates the impingement influence of the jet flow to surface of a helicopter, and analyzes the distributions of pressure and temperature on its surface carefully, which offered the basis for sheltering the surface.This paper shows an efficient method on study the flow field of rocket jet impingement in theory. The results have important theory meaning and practical value to study strength of rocket launcher and helicopter missile further.