Abstract: A fluctuating wall- pr essure measurement system is established. In a conical interactionflowfield produced by a set of swept compr ession corners, the measurement results show that the RMSvalue of fluctuating pressure and its distributions are consistent with those measured by static pressur emeasur ement system (with Scani probe) . The intermittent phenomenon caused by oscillat ing shockwave at relatively low frequencies did not appear obviously within the whole test region, which is dif2ferent from the r esults in two dimensional conditions.

Key words: shock waves, boundary layer, interfer ence, pressure oscillations, measurement