船用大侧斜螺旋桨的噪声计算与分析

摘要

Based on Detached Eddy Simulation (DES), bearing force of a five-blade highly skewed propeller in non-uniform flow field is calculated. The frequency-dependent bearing force fluctuation is obtained and analyzed by transform-ing time-dependent data. The pressure fluctuation is put as acoustic rotating dipole, then non-cavitation noise of the propeller is calculated by the method of direct boundary element method in acoustic software Virtual.Lab. The relation between pro-peller bearing force and its noise spectrum and directivity is explored.%采用分离涡模型(DES)对伴流场中螺旋桨的轴承力进行数值计算,得到轴承力的时域值,通过傅里叶变换得到频域脉动值并分析了轴承力的频域特性.将桨叶表面压力脉动作为旋转偶极子声源,采用Virtual.Lab基于直接边界元方法计算了螺旋桨的无空泡噪声,分析了螺旋桨轴承力与噪声的关系以及噪声指向性.