Research Of Structure Optimum Design For The Shock Wave System Of Ram-rotor

Ram-rotor is a new compression system which combines with the design of supersonic aircraft intake and the traditional centrifugal-flow compressor. CoMPared with the traditional axial compressor, it has the advantages of the high pressure ratio、light weight and the small volume. The shockwaves system, which is determined by the structure of ram-rotor, especially its compression surface, is the core element of the performance of ram-rotor.This article has three main parts as follows:In the first part, Fluent is compared with other CFD software, and its advantages are shown; then the component of Fluent and their function are introduced; at last, the governing equations, turbulence model, difference scheme and boundary conditions are explained.In the second part, the structure of Ram-rotor is shown, and the function of the components are explained; then the performance indexes are analyzed. As the compression surface plays the key role on the shock wave system, the structure of the compression surface is optimized, and three different kinds of compression surfaces are designed.In the last part, the completely Three-dimensional Analysis is given to the ram-rotor with the formal compression surface is give; then this article analysis how back pressure affect the flow field of ram-rotor; at last, the simulation results of ram-rotor with different compression ramps are coMPared with each other, and the rule that how compression ramp affects the performance of ram-rotor is shown.