This paper summarizes and discusses some critical aspects of flying hypersonically. The first is the L/D (lift over drag) ratio determining thrust that in turn depends on slenderness Küchemann’s τ parameter. second parameter found to depend relative importance wave versus friction drag. Ultimately, all engineering drag argued vorticity formed at expense vehicle kinetic energy, thus requiring wo...

The eeects of nite-rate wall catalyticity are evaluated by numerical simulations of hypersonic non-equilibrium ows. Several models derived from speciic gas surface chemical schemes taking into account elementary steps, such as adsorption, surface recombination and desorption, are considered. The models have been incorporated in a mixed nite-element//nite-volume code for reactive viscous ow as s...

An experimental investigation was conducted on a 5-degree half-angle cone and a 5-degree half-angle flared cone in a conventional Mach 6 wind tunnel to examine the effects of facility noise on boundary layer transition. The influence of tunnel noise was inferred by comparing transition onset locations determined from the present test to that previously obtained in a Mach 6 low disturbance quiet...