
Accession Number : ADP006069
Title : Dynamic Stability of Hypersonic Conical Lifting Vehicles According to NewtonBusemann 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 NewtonBusemann 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 crosssection and the dependence of the stiffness and dampinginpitch 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