水下系留平台的海流发电叶片翼型流噪声特性研究  

INVESTIGATION ON NOISE CHARACTERISTICS OF HYDROFOILS OF MARINE CURRENT TURBINES FOR UNDERWATER MOORING PLATFORMS

作　　者：党志高 毛昭勇[1,2] 田文龙[1,2] Dang Zhigao;Mao Zhaoyong;Tian Wenlong(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Institute of Underwater Vehicle,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学航海学院,西安710072 [2]西北工业大学水下航行器研究所,西安710072

出　　处：《太阳能学报》2021年第4期81-88,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(61572404;51809214)。

摘　　要：针对水下系留平台的海流发电叶片流噪声较为严重的现象,基于大涡模拟瞬态求解结果,采用FW-H方程对水下系留平台的海流发电叶片翼型噪声特性开展研究。研究表明:所采用的数值计算方法与经典试验测量得到的噪声频谱非常接近,说明该计算方法的适用性;3种翼型的近场噪声辐射特性存在较大差异,远场噪声均呈典型声偶极子辐射声场;随着海流速度的增大,近场噪声的指向从翼型尾缘移向前缘,近场和远场噪声声压级值均逐渐增大;倍频带声压级频谱图反映出其噪声能量值集中在低频段,且均随流速的增大而增大;随着攻角的增大,翼型流噪声声压级值逐渐增大,近场和远场辐射噪声越来越严重,这与流场压强改变密切相关。In order to investigate the serious acoustic noise of marine current turbines of underwater mooring platform,FW-H equation is adopted to study the noise characteristics of the hydrofoils of the turbine prototype based on the transient results of large eddy simulation.The results show that the numerical method and the experimental tests have consistent noise spectrum,which indicates the applicability of the numerical method in this paper.The near-field noise radiation characteristics of the three airfoils are quite different.The far-field noise radiation characteristics are typical of dipole sound fields.With the increase of flow velocity,the radiation direction of near-field noise gradually moves from the trailing edge of airfoil to the front edge,and the sound pressure levels of both near-field noise and far-field noise increase gradually.The spectra of sound pressure level in octave band show that the noise energy is concentrated in the low frequency band and increases with the increase of flow velocity.With the increase of angle of attack,the sound pressure level of hydrofoil noise increases gradually,and the radiated noise in near and far fields becomes more and more serious,which is closely related to the change of pressure in flow field.

关 键 词：噪声 翼型 大涡模拟 海流能 声场 

分 类 号：TK730[交通运输工程—轮机工程]