中文摘要：

为了研究对转螺旋桨空化噪声特性，利用Schnerr-sauer空化模型及RNG k-ε湍流模型，并采用动网格模型对对转螺旋桨进行空化数值分析。首先，对DTMB4381螺旋桨进行空化敞水性能计算，所得空泡形态与公开发表试验及数值模拟结果吻合较好。然后对对转螺旋桨空化噪声进行计算及分析，求解了不同监测点处的声压和声压功率谱密度。从计算结果可以看出噪声功率谱中存在着与前、后桨叶频相关的线谱成份。

英文摘要：

In order to study cavitation noise characteristic of contra-rotating propeller, the numerical analysis 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 result 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.