TY - JOUR
T1 - A Method of Mitigating Pulsation in Ventilated Supercavities
AU - Skidmore, Grant M.
AU - Brungart, Timothy A.
AU - Lindau, Jules W.
AU - Moeny, Michael J.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2015/12/3
Y1 - 2015/12/3
N2 - A method for mitigating ventilated supercavity pulsation is presented. The method, which has its roots in parametric oscillators, shifts the supercavity resonance frequency by modulating its gas ventilation rate. When appropriately modulated, the supercavity is driven off resonance by the waves on the gas/water interface (that remain unchanged) and pulsation is, therefore, suppressed. Initial experimental results indicate that the gas ventilation rate modulation frequency must be sufficiently different from the supercavity resonance frequency to mitigate pulsation. If the modulation frequency is not sufficiently different from the supercavity resonance frequency, pulsation is simply shifted in frequency with a corresponding small reduction in the supercavity interior pressure spectrum level and radiated noise.
AB - A method for mitigating ventilated supercavity pulsation is presented. The method, which has its roots in parametric oscillators, shifts the supercavity resonance frequency by modulating its gas ventilation rate. When appropriately modulated, the supercavity is driven off resonance by the waves on the gas/water interface (that remain unchanged) and pulsation is, therefore, suppressed. Initial experimental results indicate that the gas ventilation rate modulation frequency must be sufficiently different from the supercavity resonance frequency to mitigate pulsation. If the modulation frequency is not sufficiently different from the supercavity resonance frequency, pulsation is simply shifted in frequency with a corresponding small reduction in the supercavity interior pressure spectrum level and radiated noise.
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U2 - 10.1088/1742-6596/656/1/012170
DO - 10.1088/1742-6596/656/1/012170
M3 - Conference article
AN - SCOPUS:84956865453
VL - 656
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012170
T2 - 9th International Symposium on Cavitation, CAV 2015
Y2 - 6 December 2015 through 10 December 2015
ER -