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Using Wavelet and Hilbert-Huang Transforms for Analyzing Unsteady Pressure Fluctuations Inside an Open-Type Shallow Cavity
並列摘要
Flow over an isolated shallow open-type rectangular cavity was investigated experimentally. Pressure measurements at Mach numbers 0.3, 0.5 and 0.6 were performed. Turbulent boundary layer was naturally developed along a flat plate upstream the cavity. During the experiments two test configurations were employed. Strong resonance was observed in the pressure signals obtained at M=0.5 and M=0.6 for the test configuration with the short upstream plate. Instantaneous oscillating characteristics were studied by Wavelet and Hilbert-Huang transforms of pressure signals. The resonant intermittency was observed for a shallow cavity flow.
延伸閱讀
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