基于CFD电子膨胀阀空化及噪声特性分析  

CFD-Based Electronic Expansion Valve Cavitation and Noise Characteristics Analysis

作　　者：戴磊 王均宇 王旭飞 宋永兴 于跃平 DAI Lei;WANG Junyu;WANG Xufei;SONG Yongxing;YU Yueping(Haizhu Nuantong Technology Co.,Ltd.,Jinan 250014,China;School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China;State Key Laboratory of Compressor Technology(Compressor Technology Laboratory of Anhui Province),Anhui 230031,China)

机构地区：[1]山东海筑暖通工程有限公司,济南250014 [2]山东建筑大学热能工程学院,济南250101 [3]压缩机技术国家重点实验室(压缩机技术安徽省实验室),安徽230031

出　　处：《真空科学与技术学报》2023年第6期526-536,共11页Chinese Journal of Vacuum Science and Technology

基　　金：山东省自然科学基金项目(ZR2021QE157);压缩机技术国家重点实验室(压缩机技术安徽省实验室)开放基金项目(SKLYSJ202108)。

摘　　要：传统的节流元件(如毛细管等)越来越不能满足空调器的需求,而电子膨胀阀以其调节范围宽等优点被广泛应用。在空调运行过程中电子膨胀阀同样伴随着噪声的产生,本文基于数值计算对不同开度下电子膨胀阀的流场特性进行研究,得到了流场的分布规律和空泡的产生特点,最终得到以下结论:随着阀门开度的增大阀内流量从0.01499 kg/s增大到0.02431kg/s;流场的最大流速随阀门脉冲数的增大而增大,而阀门喉部压降随阀门开度增大而减小;空泡主要在下游产生,且随阀门开度的增大流场中空化现象逐渐减弱;当阀门开度从100脉冲增大到150脉冲时,流场的最大噪声从113.86 dB增大到122.01 dB。Traditional throttling elements(such as capillary tubes,etc.)cannot meet the needs of air conditioners,while electronic expansion valves are widely used for their wide adjustment range and other advantages.The electronic expansion valve is also accompanied by noise during the operation of the air conditioner.This paper is based on numerical calculations of the flow field characteristics of the electronic expansion valve at different openings.The distribution of the flow field and the characteristics of cavitation are obtained.Finally,the following conclusions are obtained:with the increase of valve opening,the valve flow rate increases from 0.01499 kg/s to 0.02431 kg/s;the maximum flow rate of the flow field increases with the number of valve pulses,while the pressure drop at the throat decreases with the increase of valve opening.The cavitation is mainly generated downstream,and the cavitation in the flow field gradually decreases with the increase of valve opening.The maximum noise in the flow field increases from 113.86 dB to 122.01 dB when the valve opening increases from 100 pulses to 150 pulses.

关 键 词：数值计算 CFD 空化 噪声 电子膨胀阀 

分 类 号：TB533[理学—物理]