Turbulent, Blunt-Body Surface-Heating Predictions at Mach 11.2

Mach 11.2, perfect-gas, wind-tunnel conditions of turbulent flow over a spherically-blunt nose at a Reynolds number of approximately 11×106/ft. Nose radius was 0.5 ft, wall-temperature was assumed to be 540 R, and the Baldwin-Lomax turbulence model was used to simulate turbulent eddy-viscosity effects.

Computational Grid: Computational grid used consisted of 101 body-normal grid points and 35 streamwise grid points in the blunt-body FNS (Full Navier-Stokes) region (Zone 1). At the wall, very fine grid spacing was used, resulting in a grid spacing at the stagnation point of 5.3×10-7 inch.

PC Hardware Used: Computations were done on a very old 133 MHz Intel Pentium PC, with 1 GB hard disk and 32 Meg RAM.

Computational Time Required: The numerical solution in the blunt-body region (Zone 1) was done in two steps, first with a coarse grid and then with a fine grid. Total clock time used was approximately 20 min.

Snapshots of Predicted Flowfield:

(a) Predicted surface heat flux rates with laminar and turbulent simulations are compared with turbulent experimental data.