光伏逆变器散热系统气动噪声分析研究  

Aerodynamic noise analysis of cooling system of photovoltaic inverter

作　　者：张磊[1,2] 郑昌军 张小正 ZHANG Lei;ZHENG Changjun;ZHANG Xiaozheng(School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;Institute of Sound and Vibration Research, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009 [2]合肥工业大学噪声振动工程研究所,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2022年第3期294-301,共8页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51875147)。

摘　　要：随着新能源的不断普及,家用光伏发电产业迎来了快速发展。光伏逆变器作为家用光伏发电产业中的重要装备,在解决自身散热问题的同时,还需考虑散热系统带来的气动噪声问题。文章针对某光伏逆变器散热系统的气动噪声过高问题,采用计算流体力学和气动声学相结合的手段进行流场和声场数值仿真,并通过实验手段验证了数值模型的合理性和正确性。计算结果表明:散热风扇叶片表面的压力脉动是产生过高气动噪声的重要因素;在此基础上,通过对进气格栅进行改进,减小进气气流对风扇叶片表面压力脉动的影响,有效降低了散热系统的气动噪声水平。With the continuous popularization of new energy,the domestic photovoltaic power generation industry has ushered in rapid development.As an important equipment in the domestic photovoltaic power generation industry,the aerodynamic noise problem of the photovoltaic inverter brought by the cooling system should also be considered along with the thermal problem.In order to reduce the aerodynamic noise of the cooling system of a photovoltaic inverter,the numerical simulations of flow field and sound field were carried out based on both the computational fluid dynamics and computational aerodynamic acoustics,and the validity and correctness of the numerical model were verified by experiments.It is found that the pressure pulsation on the surface of the cooling fan blade is an important factor of producing excessive aerodynamic noise.Therefore,the influence of the intake air flow on the pressure pulsation of the fan blade surface is reduced by adjusting the intake grille structure,and the aerodynamic noise level of the cooling system is effectively reduced.

关 键 词：光伏逆变器 轴流风扇 数值模拟 气动噪声 混合方法 

分 类 号：TB535.1[理学—物理]