Numerical Simulation of Compressible Separated Turbulent Flows over Inclined Slender Body

摘要

Compressible turbulent flowfields around an ogive-cylinder at moderate high AOA were numerically simulated with three eddy-viscosity models. Detailed quantitative comparisons between numerical and experimental results exhibit that all three models have satisfactorily simulated the leeward separated vortex flowfields investigated here and that the computational aerodynamic coefficients, that is, normal force, axial force, and pitching moment, and surface pressure distributions are acceptable for engineering. Among the three turbulence models tested here, the L-S and Shih et al. models provide better details of the flowfield as can be seen from the surface pressure distributions, crossflow streamlines, and limit streamlines. The three models all underestimate the actual physical dissipation near the horizontal edges of the primary vortex at section x = 11.5d, causing a certain amount of discrepancies in the total pressure between experimental and computational data.