Accession Number : AD0775210

Title :   On the Prediction of Aerodynamic Loads on Oscillating Wings in Transonic Flow,

Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s) : Tijdeman,H. ; Zwaan,R. J.

Report Date : JAN 1974

Pagination or Media Count : 30

Abstract : For a long time, flutter specialists were not concerned with unsteady aerodynamic forces in transonic flow. However, because it was proved that rapid variations of unsteady aerodynamic forces occurred during operation in the transonic speed range, especially with regard to damping, and sometimes reached such a degree that they brought about catastrophic flutter, considerable effort was undertaken to improve knowledge in this critical area. Possibilities to develop calculation methods for oscillating wings in transonic flow are discussed. Special attention is given to the question of linearisation. Shock motion and shock strength are investigated.

Descriptors :   *Swept wings, *Transonic characteristics, *Aerodynamic loading, *Oscillation, Mathematical prediction, Flutter, Computer programming, Supercritical airfoils, Linearity, Wind tunnel tests, Wind tunnel models, Pressure, Statistical distributions, Shock waves

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE