泵喷推进器水动力噪声的数值预报  

Numerical predicting of hydroacoustics of pumpjet propulsor

作　　者：付建 宋振海[1] 王永生[2] 靳栓宝[2] 

机构地区：[1]海军潜艇学院动力操纵系,山东青岛266199 [2]海军工程大学动力工程学院,武汉430033

出　　处：《船舶力学》2016年第5期613-619,共7页Journal of Ship Mechanics

基　　金：国家自然科学基金青年基金(No.51309229)

摘　　要：泵喷推进器由于其高航速时优异的噪声性能,在核潜艇上已得到广泛应用,对其水动力噪声数值计算方法进行研究具有重要意义。文中首先在利用CFD方法得到固体壁面脉动压力分布的基础上,基于边界元方法完成了静止固体壁面流噪声的计算,结合点源模型并借鉴扇声源理论完成了任意边界条件下旋转声源噪声的计算,并且噪声计算结果与试验值、文献值吻合较好;然后以某泵喷为对象分别计算了泵喷静止部件和旋转部件的水动力噪声,最后对二者声场进行叠加即得到泵喷总噪声。结果表明静止部件噪声宽带总声级在径向最高,旋转部件噪声则在轴向最高;在导叶通过频率及其谐频处,由于叶轮与导管内壁面相互作用区域脉动剧烈,使得导管成为径向测点处噪声的主要贡献者,导叶对总声场的贡献量很小。The pumpjet propulsor was used widely in nuclear submarine due to the excellent acoustic performance in high speed, and it is significant to research on the numerical predicting method of hydroacoustics of pumpjet. When the fluctuation pressure distribution of solid boundary is calculated based on CFD, the flow noise of stationary wall is calculated by BEM and the noise of rotating source is calculated consulting the point source model and acoustic fan source, the numerical result is well in agreement with the data from experiment or reference. After that the hydroacoustics of stationary component and rotating component of pumpjet is analyzed, the pumpjet noise is equal to the sum of two components noise. The result shows that the biggest wide band overall sound level of stationary component is in radial, and the biggest wide band overall sound level of rotating component is in axial. The duct is the biggest contributor for noise in radial due to the acute pressure fluctuation between blade and duct interior wall interaction area at the stator passing frequency and its harmonics, and the stator contribution to total noise is very small.

关 键 词：泵喷推进器 水动力噪声 点源模型 扇声源 边界元法 计算流体力学 

分 类 号：U664.34[交通运输工程—船舶及航道工程]