Firstly configurations of the generic sidewall compression scramjet inlets were introduced and then two kinds of spillage that sidewall compression inlets might occur were introduced.Spillage induced by the back-swept sidewall leading edge is called Configuration Spillage

while spillage evoked by the pressure difference is described as Pressure-Driven Spillage.Parametric analysis of the inviscid effects of leading edge sweep

sidewall compression

width-height ratio

cowl position and inflow Mach number on spillage was carried out.Finally

numerical simulations were performed for a series of inlets at various flight altitude and speed.The research indicates that the area of spillage window

which is mainly determined by the position of the cowl

significantly influences the spillage characteristics of the scramjet inlet.