Accession Number : ADP004170

Title :   Theoretical Investigation of Dynamic Stall Using a Momentum Integral Method,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Jumper,E. J. ; Hitchcock,J. E.

Report Date : 1984

Pagination or Media Count : 4

Abstract : An analytical study into the gust response of an airfoil is presented. The momentum-integral equation for steady flow is extended into the airfoil that experiences a constant-rate-of-change of angle-of-attack gust. The von Karman-Pohlhausen method of integration is successfully modified to incorporate the additional transient flow terms; the equation of closure necessary to do this is also presented. Finally, computation of the flow about a Joukowski airfoil using the new equations is performed and the results are presented and discussed. It is shown that these results are in agreement with existing experimental data.

Descriptors :   *Stalling, Unsteady flow, Gust loads, Wings, Dynamic response, Mathematical prediction, Integral equations, Transients, Angle of attack, Variations, Momentum, Gusts, Airfoils

Distribution Statement : APPROVED FOR PUBLIC RELEASE