Study Of Inlets/body Aerodynamic Interference Of Supersonic Tactical Missile Using Numerical Simulation

Ramjet engine is ideal propulsive equipment for new supersonic missile, and supersonic inlets are important components. For a missile with supersonic inlets, there's complicated aerodynamic interference between body and inlets, and this aerodynamic interference is difficulty to analysis in theory. In recent years, Numerical Simulation was introduced into aerospace engineering and applied to aerodynamic analyze successfully. In this paper, computational fluid dynamics(CFD) was applied to study the law of inlets/body aerodynamic interference.The common process of numerical simulation was discussed first. The physical model and governing equation of interferential flow fields was established, and the numerical method to compute governing equation was studied. Secondly, desired inlets were designed according to theory of supersonic inlets, and four different aerodynamic configurations were also designed according to different location of inlets. Finally, The combinative numerical model of inner and exterior flow fields of inlets and assemblies were established. Through numerical simulation, flow field's characteristic of inlets and different configurations were gained, and the arithmetic of aerodynamics was founded. The results of numerical simulation shows that computational fluid dynamics (CFD) can be applied to analyze complicated flow fields commendably, There's strong aerodynamic interference between body and inlets, and different law is showed for different configurations of body and inlets.