Based on experimental results for a two-dimensional airfoil (NACA 64A006) with a sinusoidally-oscillating trailing-edge flap an illustration is given of typical effects occurring in high subsonic and transonic flow around oscillating airfoils and wings. It is shown that in this speed regime the unsteady airloads are influenced considerably by the interaction of the steady and unsteady flow fields. Moreover the periodical motion of the shock waves - if present - introduces relatively high local loads, which may contribute significantly to the overall unsteady forces and moments. In addition a review is given of available theoretical methods and it is tried to rate the practical value of some of the most advanced methods, which take into account both the effect of thickness and the effect of the oscillating shock waves.
High Subsonic and Transonic Effects in Unsteady Aerodynamics
1975
65 pages
Report
Keine Angabe
Englisch
Subsonic/Transonic Configuration Aerodynamics
NTIS | 1980
Unsteady transonic aerodynamics
TIBKAT | 1989
|Subsonic/transonic configuration aerodynamics : papers
TIBKAT | 1980