Abstract
An experiment has been conducted to investigate static pressure fluctuation behind shock wave in self-excited shock wave oscillation phenomenon on 2D symmetrical circular-arc airfoil in internal transonic flow. Static pressure fluctuation was measured by high-response static pressure probe, and flow was visualized by Schlieren method. Experimental results show that static pressure fluctuation become smaller, as shock wave movement become smaller. In addition, concerning the phase delay of static pressure fluctuation behind shock wave, the overall trend is that the phase delay becomes larger, as the measured point leave for shock wave. When the shock wave form is saw tooth wave, phase delay trended to different from when the shock wave form is sine wave.
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