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| Effects of skew and load on propeller non-cavitation and cavitation hydrodynamic performances |
| Received:May 25, 2011 Revised:January 11, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20125021 |
| KeyWord:propeller cavitation initial inception thrust breakdown skew load |
| Author | Institution |
| 杨琼方 |
海军工程大学 船舶与动力学院, 武汉 |
| 王永生 |
海军工程大学 船舶与动力学院, 武汉 |
| 张志宏 |
海军工程大学 理学院, 武汉 |
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| Abstract: |
| Effects of skew and load on propeller non-cavitation and cavitation hydrodynamic performances were presented to quantitative analysis of the effects on cavitation inception speed.Exactly,the cavitating breakdown performances,cavitation inception characteristics,and the forward,backward and crashbacking open water performances under non-cavitation conditions of both NSRDC4381 no skew propeller and 4383 100% skewed propeller were simulated with improved Sauer cavitation model and modified shear stress transport turbulence model.Results show that calculated open water performances and thrust and torque coefficients versus advance ratio over a range of cavitation indices for both of the two propellers are all got successful validation against experiment.The effects of skew on forward and crashback open water performances and cavitating breakdown characteristics are negligible over the range of moderately loads (J=0.5~0.9),but substantially declines the backward performances.Under heavy and light loading conditions,the skew can both elevate the inception performances significantly.Given the skew,the load will directly influence the wake turbulent velocity fluctuation and vortex center,and the axial velo-city streamtube shape,so to the non-cavitation and cavitation propulsion performances. |
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