潜艇围壳线型优化抑制脉动压力与流激噪声的数值模拟研究  

Numerical simulation on the effect of fairwater optimization to suppress the wall pressure fluctuations and flow induced noise

作　　者：张楠[1] 吕世金[1] 沈泓萃[1] 谢华[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2014年第4期448-458,共11页Journal of Ship Mechanics

基　　金：自然科学基金资助项目(51079133);江苏省自然科学基金资助项目(BK2010162)

摘　　要：潜艇脉动压力与流激噪声的数值预报与分析已经成为流声耦合研究领域的重要课题。文章对于潜艇围壳进行了前缘加装填角以及三维座舱型围壳的线型优化,并采用大涡模拟与声学类比方法对于原围壳、带填角围壳与三维围壳的涡旋流场(马蹄涡)和声学特征进行了数值计算评估,分析了围壳线型优化对于壁面脉动压力和流激噪声的定量影响与抑制效果,研究表明直立型围壳加装填角或者进行三维流线型设计,可以明显改善围壳区域特别是围壳与艇体交接部的流动品质,使得脉动压力与流激噪声显著下降。文中工作有益于潜艇流声耦合学术研究以及未来新型潜艇设计。Numerical simulation of wall pressure fluctuations and flow induced noise of submarine has be-come vigorous in the field of flow-acoustic coupling. The fairwater of a submarine is optimized by two shapes, one is the fairwater with fillet, and another is three-dimensional canopy-like fairwater. Numerical investigation by LES and acoustic analogy is carried out to analyze the vortical flow fields （horse-shoe vor-tex） and acoustic characteristics of the three fairwaters, and the effect of optimization is studied to describe the quantitative change of pressure fluctuations and flow induced noise. This study shows that the optimiza-tion of fairwater is able to improve the flow quality around fairwater especially in the junction of fairwater and hull, and the wall pressure fluctuations and flow induced noise can be suppressed obviously. The work is beneficial to the research in the field of flow-acoustic coupling and the design of the submarine with a new type.

关 键 词：围壳 线型优化 马蹄涡 脉动压力 流激噪声 大涡模拟 声学类比 

分 类 号：U661.3[交通运输工程—船舶及航道工程]