Selection of design parameters for streamtraced hypersonic Busemann inlets

Numerical simulation of a series of streamtraced hypersonic Busemann inlets have been conducted at Mach 6 to study the influence of conical flowfield design Mach number Ma1 and cowl offset d/R1 on inlet performance.The results show that small conical flowfield design Mach number Ma1 should be used in order to obtain higher mass capture ratio and pressure ratio while the compression efficiency is not low.However the exit flowfield distortion tend to be more violent.Higher cowl offset d/R1 leads to lower mass capture ratio and pressure ratio and it can ease boundary layer separation in the inlet.