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Numerical analysis for sheet cavitation noise characteristic of countra-rotating propeller
Pages: 778-785
Year: Issue:  7
Journal: Journal of Ship Mechanics

Keyword:  sheet cavitationcontra-rotating propellernumerical analysis;
Abstract: In order to study cavitation noise characteristic of contra-rotating propeller, the numerical anal-ysis of counter-rotation propeller cavitation was accomplished by using Schnerr-sauer cavitation model, RNG k-ε turbulence model and dynamic mesh model. The open-water performance was done with DTMB4381 propeller cavitation, the predicted cavity shapes were in agreement with both the experimental observation and numerical simulation result on open literature. And, by calculating and analyzing the contra-rotating pro-peller cavitation, the sound pressure and power spectrum density of different monitors was solved. The re-sult shows that line-spectrum which is related to the blade frequences of front and rear propeller existing in the power spectrum and the non-uniformity of rear propeller flow is more obviously than front propeller.
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