Accession Number : ADA263879

Title :   The Application of Concentric Vortex Simulation to Calculating the Aerodynamic Characteristics of Bodies of Revolution at High Angles of Attack,

Corporate Author : FOREIGN AEROSPACE SCIENCE AND TECHNOLOGY CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Xianlin, Ban ; Xing, Tu

Report Date : 27 APR 1993

Pagination or Media Count : 16

Abstract : The aerodynamic characteristic of sharp nosed bodies of revolution is calculated by using concentric vortex simulation in this paper. Based on the experimental results, an appropriate set of free integration parameters is selected and an empirical relation between initial separation angle and the Reynolds number is established. Thus, the effect of the Reynolds number is reasonably considered in the calculation. The effect of the Mach number is corrected by using Gothert's rule. The differential equations of vortex motion are solved by using the fourth order Runge Kutta method with varying step size. Three different initial step sizes are used in different integration positions in order to increase the speed of calculation. Two models (F3Al6 and F3.5A7) were calculated in this paper.

Descriptors :   *AERODYNAMIC CHARACTERISTICS, *BODIES OF REVOLUTION, *COMPUTATIONS, AERODYNAMICS, ANGLES, BODIES, DIFFERENTIAL EQUATIONS, EQUATIONS, INTEGRATION, MACH NUMBER, MODELS, MOTION, NUMBERS, PAPER, PARAMETERS, REYNOLDS NUMBER, SEPARATION, SIMULATION, VELOCITY, FOREIGN TECHNOLOGY, ANGLE OF ATTACK, CHINA.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE