J1002-4-3 遷音速内部流中の二次元対称円弧翼における衝撃波自励振動に与える翼厚の影響(流体関連の騒音と振動4)

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.