基于Kirchhoff方法的水下自由湍射流场噪声预报(英文)  

Noise Prediction of Submerged Free Jet Based on Kirchhoff Formulation

作　　者：王春旭[1] 张涛[1] 侯国祥[1] 朱海飞[2] 

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074 [2]安世亚太武汉分公司,武汉430071

出　　处：《船舶力学》2010年第3期305-313,共9页Journal of Ship Mechanics

摘　　要：该文旨在研究类似的水下自由射流场噪声机理和预报方法。构造了Kirchhoff理论和CFD方法相结合的算法;详细推导了Kirchhoff方法噪声预报的原理;讨论其适用性,并引入了非线性修正方法。用大涡模拟法对水下自由射流场进行数值模拟,以此作为近场声源;随后,运用所推导的Kirchhoff方法对控制面外噪声场进行预估,并分析了自由射流场声辐射机理。A theoretical investigation was done on the subjects of noise mechanism and forecasting methodology of submerged free jet such as the flow-field induced by waterjet propulsion.An algorithm was proposed to combine the Kirchhoff formulation and CFD approach.The noise prediction mechanism and applicability using Kirchhoff formulation were deduced and explained in detail.Then a nonlinear influence modification was introduced into this approach.As an example,a numerical simulation of the submerged free jet flow was given by the method of Large Eddy Simulation using FLUENT,which is considered as the near-field noise source;then the far-field acoustic pressure and power spectral density were derived by using the Kirchhoff formulation and the nonlinear modified model,then the noise mechanism of submerged free jet flow field was analyzed.

关 键 词：KIRCHHOFF方法 水下自由射流场 噪声预报 喷注噪声 

分 类 号：U661.44[交通运输工程—船舶及航道工程] TB53[交通运输工程—船舶与海洋工程]