Measurements of Real Gas Effects on Regions of Laminar Shock Wave/Boundary Layer Interaction in Hypervelocity Flows for 'Blind' Code Validation Studies

摘要

Detailed surface heat transfer and pressure measurements have been made in laminar separated regions of shock wave/boundary layer interaction in high-enthalpy flows over double cone and hollow cylinder/flare configurations to provide data sets with well-defined boundary conditions for comparison with Navier-Stokes computations including the effects of nonequilibrium air chemistry. In these experimental studies, which were conducted in the LENS I and XX shock/expansion tunnels, measurements were made in air, nitrogen, and oxygen for a range of Reynolds number conditions at velocities from 8,000 to 22,000 ft/s to provide measurements with which to evaluate the models of real gas chemistry employed in Navier-Stokes codes. Flowfield measurements have been made with high-speed Schlieren photography and interferometry to provide additional measurements to define the size and structure of the separated interaction region. Details of the model configurations and the freestream conditions at which these studies have been conducted, together with earlier measurements and measurements upstream of the interaction regions are presented in this paper to enable computations to be performed with both Navier-Stokes and DSMC prediction methods for "blind comparisons" with the experimental data. These comparisons will be presented at an AIAA meeting during the coming year.