Figure 6 | Scientific Reports

Figure 6

From: Throttling process of a supersonic cascade studied by high-frequency response pressure and high-speed schlieren

Figure 6

Power spectrum density contours of the pressure signals at P1 and S1 obtained using joint time–frequency analysis over the entire throttling process. Attached and separated flows observed in the pressure signals at (a) P1 and (b) S1 during the period 5 s < t < 15 s. Separated and oscillatory flows observed in the pressure signals at (a*) P1 and (b*) S1 during the period 15 s < t < 20 s. Separated and attached flows observed in the pressure signals at (a**) P1 and (b**) S1 during the period 20 s < t < 30 s.

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