Parameter research of MHD controlled inlet and the viscous effects analysis

Two-dimensional inviscid steady-state flow equations coupled with MHD effects are solved jointly with MHD equations to research the performance of an MHD controlled inlet when flight Mach number is higher than the design value. At a proper choice of parameters the shock waves are moved back to the cowl lip, and the outlet parameters became more uniform. Influence of the MHD interaction location, width and depth on the MHD controlled inlet performance are analyzed, the calculations show that, if technical condition allow, to make the outlet flow evener the MHD region should be placed upper stream and probe into the flow deeper. With a wider MHD interaction region, smaller magnitude of the magnetic induction is needed to move the shock waves back to the cowl lip. Based on the inviscid results, a group of optimized parameters are chosen to research the viscous effects on the MHD controlled inlet. Results show that boundary layer separation can be depressed by MHD interaction, and the flow in the inner inlet will come back to the design state.