基于LES和FW-H耦合的水面船舶声场研究  

Study of the ship acoustic field based on the coupling of LES and FW-H equation

作　　者：王诗洋 韩康 唐首祺 王文全 WANG Shiyang;HAN Kang;TANG Shouqi;WANG Wenquan(Marine Design and Research Institute of China,Shanghai 200011,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国船舶工业公司第七〇八研究所,上海200011 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2018年第6期22-26,共5页Applied Science and Technology

基　　金：国家自然科学基金项目(51679052;51639004);国防基础科研计划项目(JCKY2016604B001)

摘　　要：为了优化舰艇的噪声性能,提升舰艇隐蔽性,针对水面船舶声场进行研究。研究针对某型船,采用计算流体力学(CFD)理论,结合雷诺平均N-S方程并使用大涡模拟(LES)方法进行方程组封闭,对船体流场进行了仿真计算,并与试验结果进行比较,然后加载FW-H声学模型对各航速下船体的流噪声声场进行模拟。流场计算结果显示:各航速下船体阻力的计算值与试验数据吻合度较高;声场计算得到了各监测点在不同频率下的噪声级,分析了不同剖面位置处、不同频率下的声指向性等;通过分析特征点的声压级曲线得出,船体的流噪声主要集中在低频段,噪声衰减速度随频率增大而减小。仿真结果表明,所采用的计算方法能够较为准确地模拟船体的流场和声场,为水面舰艇的流噪声研究提供了一条可行的途径。In order to optimize noise performance of the ship and improve concealability of the ship,this paper studies the sound field of the ship on the surface of ocean.As for a certain type of ships,this study combined the computational fluid dynamics(CFD)theory with the Reynolds mean N-S equation and used the large eddy simulation(LES)method to make equations closed.The simulation calculation for flow field around the hull was carried out,and the results were compared with the test results.Then the FW-H acoustic model was loaded to simulate flow noise acoustic field of the hull under various speed.As is known from flow field calculation results:the calculated value of hull resistance under different speed agrees well with the test data;get the noise class of monitored spots from acoustic field calculation under different frequencies,and analyze the sound directivity and attenuation of different section location under different frequencies.According to analysis of the sound pressure level(SPL)of characteristic point,it can be derived that the flow noise of hull mainly concentrates in the low-frequency stage,and noise attenuation rate decreases with increase of frequency.Simulation results show that the calculation method adopted in this paper can simulate the flow field and acoustic field accurately,providing a feasible way for studying flow noise of the ship.

关 键 词：噪声 水面舰艇 大涡模拟 FW-H声学模型 流噪声 流场 声场 声指向性图 

分 类 号：U661.7[交通运输工程—船舶及航道工程]