Computational and Experimental Research on Buffet Phenomena of Transonic Airfoils

Abstract

Buffet phenomena on supercritical airfoils have been investigated both experimentally and numerically. The experiments were performed for NACA0012 and KORN 75–06–12 airfoils using high-speed Schlieren VTR and pressure transducers. The analysis shows significant effects of the geometries and the Reynolds number. A 2-D N-S code was used to predict these phenomena. The result shows the macro-scale effects of airfoil geometry, Reynolds number, and transition. A fine strucure of the motion such as the periodic trailing edge pressure history was captured. The basic frequency of the buffet motion agrees well with the experiment.