Abstract
An experiment has been conducted to investigate the influence of the airfoil thickness on self-excited shock wave oscillation on a 2D symmetrical circular-arc airfoil in internal transonic flow. The airfoils with 15%, 12% and 10% thickness were tested. Flow was visualized by Schlieren method, and shock wave positions were measured by line scan camera. The experimental result shows that amplitude of the continuous shock wave oscillation become smaller as the airfoil is made thin, on the other hand, the airfoil thickness almost doesn't influence the oscillation frequency and the oscillation phase difference between upper and lower surface.
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