Design and analysis of a Ventral Diverterless Supersonic Inlet

Abstract

The diverterless supersonic inlet (DSI) has the advantages of good stealth performance and light structure weight. In this paper, the Bump surface is designed based on the flow field obtained by Taylor-Maccoll equation solving the supersonic conical flow, and a ventral diverterless supersonic inlet is given by the method. Numerical simulation is used to study the mechanism of the Bump surface for diverting the boundary layer. Results indicates: (1) the lateral pressure gradient created by the shock wave at the leading edge of the Bump surface is the main reason of pushing the boundary layer away; (2) the total pressure loss due to the shock wave will be small for better combination of the Bump surface and the lip; (3) it is necessary to design the duct of the DSI inlet with refinement to achieve low distortion.