Fluctuating wall pressure measurements have been made upstream of the corner line in Mach 5 compression ramp interactions generated by unswept and 10-, 20-, 25-, 30-, 40-, and 50-deg swept models. The streamwise ramp angle was 28 deg in all cases. The results show the following: 1) In highly swept interactions the rms distributions of pressure fluctuations as well as the mean distributions are essentially quasiconically symmetric. The rms levels decrease globally with increasing sweep as does the maximum rms generated by the translating separation shock. 2) The length of the intermittent region, over which the separation shock foot translates, decreases with increasing sweep. In a given interaction, the length of the intermittent region grows spanwise. 3) Dominant separation shock frequencies increase from about 0.3-0.5 kHz in unswept flows to about 2-7 kHz in highly swept flows. In a given interaction, shock frequencies decrease spanwise. 4) The higher frequencies are shown to be a direct result of the decrease in the length scale of the separation shock motion.
No takes yet. Share an insight, caveat, or question.
Erengil et al. (1993) studied this question.