非均匀伴流下无空泡螺旋桨涡流噪声的数值研究  

Numerical Investigation of Vortex Noise of Non-Cavitation Propeller in Non-Uniform Ship's Wake

作　　者：姚慧岚 张怀新[1] YAO Huilan;ZHANG Huaixin(State Key Laboratory of Ocean Engineering,Collaborative Innovation Center for Advance Ship and Deep-Sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《中国造船》2018年第3期13-22,共10页Shipbuilding of China

基　　金：国家自然科学基金(51479116，11272216)。

摘　　要：应用分离涡方法(DES)对螺旋桨的涡流场进行了模拟。提出了一种在桨叶附近生成高质量边界层网格的结构化网格划分方法。利用Q准则和自定义函数对桨叶泄涡及其频率特性进行了研究。以桨叶表面脉动压力为声源,通过求解FW-H方程对螺旋桨噪声进行了预报。频谱分析表明螺旋桨低频离散线谱噪声、低频宽带噪声以及高频涡流噪声都得到了较好的预报,特别对涡流噪声的频谱特性进行了分析。数值计算结果表明:以单桨叶表面压力脉动为声源,涡流噪声为单调音,频率即为桨叶泄涡频率,声压级比宽带噪声高出约15 dB;以整个螺旋桨表面压力脉动为声源,涡流噪声在泄涡频率附近有着多条线谱,各线谱的频率间隔相等,声压级比宽带噪声高出约10 dB。Detached eddy simulation method was applied to simulate the eddy current field of a propeller.A structural mesh generation method was proposed to generate high quality meshes in the boundary layer of the blades.Q-criterion and user-defined function was used to investigate shedding vortex of the blade and its frequency characteristic.Propeller noise was predicted by solving the Ffowcs Williams-Hawkings equations in which fluctuating pressure on the blade surface was treated as a source term.Spectrum analysis shows that low-frequency discrete line spectrum and high-frequency vortex noise of the propeller are well predicted.It is shown that vortex noise is a type of single tune with frequency same as the vortex shedding frequency and sound pressure level(SPL)15 dB greater than that of the broadband noise by the fluctuating pressure.

关 键 词：螺旋桨泄涡 螺旋桨噪声 涡流噪声 DES FW-H 

分 类 号：O427.4[理学—声学]