冰箱压缩机启动过程排气噪声特性及优化

Exhaust noise characteristics of refrigerator compressor during startup process and its optimization

根据冰箱压缩机启动过程的特点,采用ANSYS软件对冰箱压缩机排气管路进行流场和声场模拟仿真计算,分析冰箱压缩机启动过程排气噪声特性。在排除偶极子噪声和四极子噪声的基础上得出,单极子声源对启动过程的排气噪声贡献最大。考虑到单极子噪声主要受气流速度影响,为降低排气流域最高气流速度,提出将排气腔与排气管进口的连接管道由单通道调整为双通道。仿真结果表明,双通道模型可以使启动过程中排气流域最高气流速度下降5~20 m/s,使排气噪声总声压级下降2~5 dB,进一步验证双通道结构降噪的有效性。研究结果可以为解决冰箱压缩机启动过程排气噪声问题提供理论依据。

According to the characteristics of the startup process of the refrigerator compressor,the flow field and sound field of the exhaust pipe of the refrigerator compressor are simulated by using the ANSYS software,and the exhaust noise characteristics of the refrigerator compressor during the startup process are analyzed.On the basis of eliminating dipole noise and quadrupole noise,it is concluded that monopole sound source contributes the most to exhaust noise during startup process.Considering that the monopole noise is mainly affected by the airflow velocity,in order to reduce the maximum airflow velocity in the exhaust area,it is proposed to adjust the connecting pipe between the exhaust chamber and the exhaust pipe inlet from a single channel to a dual channel.The simulation results show that the dual channel model can reduce the maximum airflow velocity in the exhaust area by 5-20 m/s and the total sound pressure level of exhaust noise by 2-5 dB during the startup process,further verifying the effectiveness of dual channel structure noise reduction.The research results can provide a theoretical basis for solving the exhaust noise problem of refrigerator compressor during startup process.