Influence of Surface Roughness and Freestream Turbulence on the Second Order Transport of Turbulence in Non-Equilibrium Boundary Layers

摘要

This document describes the results of AFOSR Grant F49620-01-1-0115, which was a one-year project to bridge the gap between AFOSR Grants F49620-98-1- 0038 and F49620-02-1-0365. The objectives of the grant F49620-01-1-0115 were to design and construct Mach 3.0 rough-wall, favorable pressure-gradient test sections and perform wind tunnel tests. Ten favorable pressure gradient models were designed and constructed. However, testing was not accomplished. Instead, to continue progress, numerical simulations were performed. First, algebraic roughness models, which were previously validated by the PI for flat-plate flows, were incorporated into a parabolized Navier-Stokes solver, and simulations of the smooth and rough wall supersonic favorable pressure gradient flows were accomplished. Second, additional simulations were performed with the Wilcox k-w model using the Aerosoft, Inc. CFD code GASP.