基于声模拟理论的水下自由射流场噪声预报  

Noise prediction of submerged free jet based on theory of acoustic analogy

作　　者：王春旭[1] 张涛[1] 邹建[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]海军指挥学院浦口分院信息战研究系,南京211800

出　　处：《船舶力学》2009年第5期822-827,共6页Journal of Ship Mechanics

摘　　要：喷水推进器喷注噪声是潜艇重要的水下噪声源。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。构造了声模拟理论和CFD方法相结合的算法;详细推导了Lighthill声模拟理论噪声预报的原理;用Reynold平均法采用k-ε模型对水下自由射流场进行数值模拟,并以此作为近场声源;随后,运用Lighthill声模拟理论对远场噪声进行预估,并分析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, which is important noise sources to submarine.An algorithm was proposed to combine the theory of acoustic analogy and CFD approach.The noise prediction mechanism using Lighthill＇s Acoustic Analogy was deduced in detail.After that,a numerical simulation of the submerged free jet flow was given by the method of Reynold-average Navier-Stocks using κ-ε model, which was considered as the near-field noise sources; then the far-field acoustic pressure was deserved using the theory of acoustic analogy and the noise mechanism of submerged free jet flow field was analyzed.

关 键 词：声模拟理论 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]