Accession Number : AD0354633

Title :   RELATIVE MERIT OF EXPERIMENTAL AND ANALYTICAL AERODYNAMIC INFLUENCE COEFFICIENTS FOR PREDICTING THE FLUTTER CONDITIONS OF GENERALLY DEFORMING WINGS.

Descriptive Note : Rept. for June 60-Feb 63,

Corporate Author : AEROJET-GENERAL CORP AZUSA CA

Personal Author(s) : Mazelsky, Bernard ; Amey, Harry B., Jr. ; Cunningham, Patrick J.

Report Date : OCT 1964

Pagination or Media Count : 62

Abstract : This report summarizes a 33-month study of the flutter characteristics of generally deforming wings. Both rigid-force and flutter models were constructed for a 6%-thick, 70 degree delta wing. The former were used to obtain steadystate aerodynamic influence coefficients which were, in turn, used to predict the flutter characteristics of the latter. The technique of model construction, the problems of measuring vibration modes, and the method of evaluating influence coefficients are described. Comparisons are made between the actual flutter conditions and those predicted with both experimental and analytical aerodynamic influence coefficients. In addition, explanations are given of the alternating increases and decreases of the flutter conditions with Mach number. Finally, the significance of various parameters is discussed and suggestions are made for future research. (Author)

Descriptors :   *DELTA WINGS, *FLUTTER, WINGS, AEROELASTICITY, DEFORMATION, MATHEMATICAL MODELS, MATHEMATICAL PREDICTION, EXPERIMENTAL DATA, THEORY, MATHEMATICAL ANALYSIS, SUBSONIC CHARACTERISTICS, SUPERSONIC CHARACTERISTICS, HYPERSONIC CHARACTERISTICS, AERODYNAMIC CHARACTERISTICS, ASPECT RATIO, MATRICES(MATHEMATICS).

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE