Accession Number : ADA118446

Title :   Hereditary Models for Airfoils in Unsteady Aerodynamics, Numerical Approximations and Parameter Estimation.

Descriptive Note : Final rept. 15 Dec 79-15 Mar 81,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF MATHEMATICS

Personal Author(s) : Burns,John A ; Cliff,Eugene M

PDF Url : ADA118446

Report Date : Feb 1982

Pagination or Media Count : 82

Abstract : This report is concerned with the development of a general mathematical model for the motion of a two-dimensional airfoil in unsteady aerodynamics and with the study of numerical schemes for estimating parameters in this model. The equations of motion are a set of coupled ordinary and functional differential equations. Approximating Wagner functions are used to construct state space models that retain the hereditary nature of unsteady fluid flow. The results of some simple numerical experiments are presented including a preliminary analysis of wind-tunnel data. (Author)

Descriptors :   *Airfoils, Aerodynamic characteristics, Configurations, Approximation(Mathematics), Numerical analysis, Parameters, Estimates, Two dimensional, Equations of motion, Mathematical models

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE