CFD Applications to Supersonic and Hypersonic Flows

Dr. Kader Frendi

Mechanical and Aerospace Engineering
University of Alabama in Huntsville

October 22, 1999

Abstract

Results will be presented on the contributions of Computational Fluid dynamics to two NASA programs: High Speed Research and Hyper-X. One of the major problems in building a supersonic transport aircraft is NOISE both inside and outside the aircraft. in this talk, a fully coupled model for predicting interior noise will be presented. The results obtained from this model are then compared to existing wind tunnel data. Based on models predications, recommendations are made for noise reduction. In hypersonics, CFD is used extensively to predict forces and moments, surface temperature and pressure at various flight conditions. In this talk, a study of the Hyper-X's aerodynamic stability is performed at various angles of attack and sideslip angles and for both powered and unpowered flight conditions. CFD based recommendations are made.