声呐导流罩边界层壁面脉动压力研究进展  

Research progress in sonar dome turbulent boundary layer wall fluctuating pressure

作　　者：徐嘉启 梅志远[1] XU Jiaqi;MEI Zhiyuan(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033

出　　处：《中国舰船研究》2018年第4期57-69,共13页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51479205)

摘　　要：舰艇中、高速航行时,声呐导流罩外边界层的壁面受脉动压力激励,引起罩壳结构振动,并向罩壳内辐射噪声。该噪声是声呐平台区自噪声的主要成分。准确描述罩壳外边界层壁面脉动压力特征,是开展声呐导流罩内场自噪声影响评价以及导流罩壳减振降噪设计的基础和依据。首先,介绍壁面脉动压力功率谱的壁压试验法、半经验模型法、数值模拟法的相关进展;针对边界层转捩区的脉动压力功率谱特征,引出缩尺模型试验研究的尺度效应问题。其次,针对壁面脉动压力的尺度效应问题,概述脉动压力功率谱尺度律及其由模型试验到实船应用的发展,并介绍与缩尺模型试验载荷相似的重要手段——人工转捩方法的研究概况。最后,对人工转捩方法在声呐导流罩边界层壁面脉动压力载荷相似性研究中的应用进行展望。A sonar dome structure mounted on the bulb of a high-speed ship vibrates under Turbulent Boundary Layer(TBL)wall pressure fluctuation and radiates noise inward.As this is the main component of sonar self-noise,the accurate description of TBL wall pressure fluctuation is the basis for sonar dome self-noise impact assessment,sonar dome vibration attenuation and noise reduction design.First,the progress of the wall pressure experiment method,semi-experiment models and numerical simulation methods for the fluctuating wall pressure power spectrum are introduced;concerning the characteristics of the fluctuating wall pressure power spectrum in transitional regions,the scale problem of the scale model test is introduced.Second,aiming at the scale problem of wall pressure fluctuation,the scaling law of wall pressure fluctuation and its development from model scale test to full scale application is summarized,and the general conditions for research into the artificial transition method are introduced(the crucial method for load similarity in scale model tests).Finally,the outlook for the application of the artificial transition method in similar sonar dome TBL fluctuating wall pressure load research is obtained.

关 键 词：声呐导流罩 壁面脉动压力 尺度效应问题 脉动压力功率谱尺度律 人工转捩 

分 类 号：U661.1[交通运输工程—船舶及航道工程]