Calculation of high-speed inlet flows using the Navier-Stokes equations.

A numerical code was developed to calculate the flowfield in two-dimensional high-speed inlets using the Navier-Stokes equations . Arbitrary inlet geometries may be treated, with variable bleed on the ramp and cowl surfaces. Turbulence is incorporated through an algebraic turbulent eddy viscosity. The code was applied to the calculation of the flow in a simulated high-speed inlet operating at a Mach number of 2.5 and Reynolds number of 1.4x10SUB7 based on inlet length. Two different bleed schedules were considered, which differed principally in the extent of bleed in the vicinity of the shock-turbulent boundary interactions on the ramp surface. The computed results are compared with detailed measurements of the ramp and cowl static pressures, and boundary layer pitot profiles. The agreement with experimental data is generally good, although the experimental data display evidence of three dimensionalityt over a portion of the inlet flowfield. (A)