CAJ | 학술논문

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。
위료연구대전라선장공화조성특성，이용Schnerr-sauer공화모형급RNG k-ε단류모형，병채용동망격모형대대전라선장진행공화수치분석。수선，대DTMB4381라선장진행공화창수성능계산，소득공포형태여공개발표시험급수치모의결과문합교호。연후대대전라선장공화조성진행계산급분석，구해료불동감측점처적성압화성압공솔보밀도。종계산결과가이간출조성공솔보중존재착여전、후장협빈상관적선보성빈。
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.