噪声与振动控制2025，Vol.45Issue(3)：8-14,7.DOI:10.3969/j.issn.1006-1355.2025.03.002
冷藏展示柜风冷系统降噪数值模拟及实验验证
Numerical Simulation and Experimental Verification of Noise Reduction of Air Cooling System for Refrigerated Display Cabinets
摘要
Abstract
Aiming at the aerodynamic noise problem of the air cooling system of the vertical refrigerated display cabi-nets,the numerical simulation of the air duct was carried out by using Lighthill acoustic analogy theory,FW-H(Ffowcs Wil-liams-Hawkings)acoustic wave equation and finite element software Fluent.According to the numerical simulation results,the flow characteristics and aerodynamic noise characteristics of the axial flow fan were analyzed.The numerical simulation results show that the pressure difference on both sides of the fan causes a small amount of gas to flow back to the inlet along the blade tip clearance,and the vortex noise at the blade tip of the fan pressure surface is brought out from the inlet,which in-creases the aerodynamic noise of the air cooling system.The acoustic power of the aerodynamic noise is mainly distributed at the inlet of the duct plate wall surface and the blade tip area of the axial flow fan.The design schemes of nine air-cooled systems were determined by orthogonal experiments,and the effects of various parameters on the aerodynamic noise and in-let mass flow rate of the air-cooled system were studied.The experimental results show that the noise reduction effect of the four monitoring points of the vertical refrigerated display cabinet is obvious through the optimization design of the inlet di-ameter,the height of the air guide ring and the blade tip clearance.The noise test was carried out in the semi-anechoic cham-ber.The total sound pressure level of the rear measuring point is reduced by 5.79 dB(A).The research results may provide some reference for the noise reduction of the air cooling system of the vertical refrigerated display cabinets.关键词
声学/风冷系统/轴流风机/结构优化/气动噪声/正交实验Key words
acoustics/air cooling system/axial flow fan/structural optimization/aerodynamic noise/orthogonal exper-iment分类
机械工程引用本文复制引用
韩宝坤,叶国强,徐玉峰,万彦斌,杜华东,王金瑞..冷藏展示柜风冷系统降噪数值模拟及实验验证[J].噪声与振动控制,2025,45(3):8-14,7.基金项目
国家自然科学基金资助项目(52105110) （52105110）
山东省自然科学基金资助项目(ZR2021QE024,ZR2022ME119) （ZR2021QE024,ZR2022ME119）
青岛博士后资助项目(QD-BSH20220202109) （QD-BSH20220202109）
