STANFORD UNIV CA DEPT OF AERONAUTICS AND ASTRONAUTICS
Two separate areas of investigation are explored of two-dimensional flow fields computed from the Burnett and Navier-Stokes equations evaluation of various forms of Burnett equations from computations of 1-D hypersonic shock structure and 2-D flow over a flat plate at zero incidence and investigation of the interaction at high altitudes of a hypersonic oblique shock impinging on a cowl lip. Among five different formulations of Burnett equations, two were found to exhibit in shock structure a small region of flow wherein the heat flux is physically unreal. Preliminary computations with the three other formulations are made for flow over a flat plate. It is found that the well-known severe overheating, due to oblique shock impingement on a leading edge, decreases significantly as altitude increases, disappearing at Knudsen numbers above about 0.1. Burnett Equations, Hypersonic flow, Shock structure, Shock on cowl lip interaction.