Abstract
The mechanisms and scaling laws for acoustic tone generation by gas and liquid flow through multiholed plates have been studied experimentally. Rigid and compliant multiholed plates were tested in quiet air and water flow facilities to determine hydroacoustic and hydroelastic resonance frequencies as a function of hole diameter, length and spacing, and flow conditions. The resonance frequencies are expressed as a Strouhal number based on hole dimensions and flow velocity and presented as a function of Reynolds number, hole shape, and Mach number. The scaling laws for predicting upper bounds for the tone pressure amplitudes are also presented.
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