通风管道弯头加装导流片对流噪声的影响  

Influnce of Ventilation Duct Elbows with Deflectors on Flow Noise

作　　者：王景文 温华兵[1] 陈聪 郑镜华 WANG Jingwen;WEN Huabing;CHEN Cong;ZHENG Jinghua(Institute of Vibration and Noise,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Research and Development Department,China Ship Cruise Technology Development Co.,Ltd.,Shanghai 201208,China)

机构地区：[1]江苏科技大学振动噪声研究所,江苏镇江212003 [2]中船邮轮科技发展有限公司研究开发部,上海201208

出　　处：《机械制造与自动化》2024年第6期88-92,共5页Machine Building & Automation

摘　　要：针对空调通风系统部件弯头流噪声问题,以管道出口处的流噪声为分析对象,基于有限元方法研究通风管道弯头内布置导流片对管道内部流场及出口流噪声的影响,探明导流片形状及数量参数的作用规律。模拟分析结果表明:管道出口处的流噪声是由于管道中湍流产生的漩涡以及压力脉动所产生的,加装直导流片反而会使出口流噪声增大,而弧形导流片可以起到稳流的作用,能减少壁面的漩涡结构和大小,减小脉动压力强度,降低出口流噪声的声压级水平;随着弧形导流片数量增加,出口流噪声的声压级下降明显。For the flow noise at the elbow of air conditioning and ventilation system components,with the flow noise at the outlet of the duct taken as the reserch object,the influence of the flow guide sheet arranged inside the elbow of the ventilation duct over the internal flow field and the outlet flow noise is studied based on the finite element method,and the action law of the shape and number parameters of the flow guide sheet is explored.The results show that the flow noise at the outlet of the duct is caused by the vortex and pressure pulsation generated by the turbulent flow in the duct,and the addition of straight deflectors will increase the outlet flow noise,while the curved deflectors can play a role in stabilizing the flow,which reduces the vortex structure and size of the wall,the pulsation pressure intensity,and the sound pressure level of the outlet flow noise.The more the number of curved deflectors increases,the more obviously the sound pressure level of flow noise at the outlet decreases.

关 键 词：空调器 导流片 弯头 漩涡 湍流 流噪声 

分 类 号：TB535[理学—物理]