Statistics – Computation
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phdt........28r&link_type=abstract
Ph.D. Thesis Texas Univ., Austin.
Statistics
Computation
Boundary Layers, Flow Distribution, Heat Transfer, Hypersonic Speed, Mach Number, Pressure Distribution, Shock Waves, Angle Of Attack, Computational Grids, Fins, Hypersonics, Inviscid Flow, Navier-Stokes Equation, Shock Layers, Turbulence Models
Scientific paper
A combined experimental and computational study has been performed of sharp fin induced shock wave/turbulent boundary layer interactions at Mach numbers of 5, 6, and 11. New experimental data were obtained at Mach 5 and include mean surface heat transfer and pressure distributions and surface flow visualization for fin angles of attack of 6, 8, 10, 12, 14 and 16 degrees. Detailed heat transfer measurements were also taken radially at 8 and 16 degrees to study the flowfield's conical nature. Conical Navier-Stokes calculations have been performed using the Baldwin/Lomax turbulence model. Computations were made for two angles of attack at each of the three Mach numbers. The Mach 6 and 11 data used for comparison with the computations, were from the earlier experimental studies of Law and Holden. Careful evaluation of the performance of this numerical approach has been carried out with an emphasis on the surface heat transfer predictions. The new experimental results are described in detail and compared with existing empirical correlations. Comparisons of the experimental data with the computations reveal that the conical Navier-Stokes/Baldwin-Lomax approach underpredicts the physical extent of the interactions for the lower two Mach numbers. However, this trend is reversed at Mach 11. The numerical results overpredict peak heat transfer, although the outer scaling of the Baldwin-Lomax model prevent a grid independent solution. The computed flowfields reveal a large primary vortex located adjacent to the surface just beneath the inviscid shock wave and a smaller corner vortex located very near the fin/surface junction.
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