Accession Number : AD0657325

Title :   THE EFFECT OF SEVERE NOSE BLUNTNESS ON THE STABILITY OF SLENDER CONES IN HYPERSONIC FLOW,

Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Quinn,Brian

Report Date : MAY 1967

Pagination or Media Count : 33

Abstract : The flow around a blunted slender cone performing pitching oscillations is theoretically analyzed by means of Chernyi's blast-wave piston analogy. Stationary and transient shock shapes and pressure distributions are presented in power series form. Within the region of applicability, the stationary pressure agrees well with Chernyi's numerical integration. Normal force and pitching moment coefficient derivatives are presented and the results are plotted for a 10 degree cone. The theoretical static and dynamic stability derivatives agree satisfactorily with recent experiments in a Mach 14 wind tunnel. It is concluded that the experimentally observed reduction in static and dynamic stability due to increased nose bluntness may be attributed to blast wave effects. (Author)

Descriptors :   (*CONICAL BODIES, STABILITY), (*NOSE CONES, HYPERSONIC CHARACTERISTICS), SLENDER BODIES, BLUNT BODIES, HYPERSONIC FLOW, REENTRY VEHICLES, EQUATIONS OF MOTION, SHOCK WAVES, PITCH(MOTION)

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE