Accession Number : ADP006069

Title :   Dynamic Stability of Hypersonic Conical Lifting Vehicles According to Newton-Busemann Theory,

Corporate Author : WATERLOO UNIV (ONTARIO)

Personal Author(s) : Hui, W. H. ; Van Roessel, H. J.

Report Date : NOV 1987

Pagination or Media Count : 13

Abstract : In this paper a theory is given of the aerodynamic stability of hypersonic conical lifting vehicles performing small amplitude pitching motion about its steady flight by using the Newton-Busemann flow theory, which is the rational limit of gasdynamic theory as the flight Mach number M at infinity approaches infinity and the ratio material functions as independent variables which are a generalisation of the stream functions of geodesics of the body surface. The unsteady flow field is then calculated by perturbation of the steady flow; in particular for conical shapes it requires only numerical quadrature. The theory is applied to conical wings of parabolic cross-section and the dependence of the stiffness and damping-in-pitch derivative on the angle of attack, the slenderness, concavity and convexity of the wing, and on the pivot axis position is studied systematically.

Descriptors :   *LIFTING BODIES, *CONICAL WINGS, *HYPERSONIC VEHICLES, AERODYNAMIC STABILITY, PITCH(MOTION), SPECIFIC HEAT, AEROTHERMODYNAMICS, GAS DYNAMICS, FLOW FIELDS, STEADY FLOW, SYMPOSIA.

Subject Categories : Fluid Mechanics
      Aerodynamics
      Research and Experimental Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE