往复式压缩机吸气消音器声学特性及流体性能综合研究
Comprehensive study on acoustic characteristics and fluid performance of suction muffler of reciprocating compressor
杨鑫 1陈新杰 1张巍 1葛成伟 1郑星炜1
作者信息
- 1. 安徽美芝制冷设备有限公司 安徽合肥 230031
- 折叠
摘要
往复式压缩机吸气消音器对整机噪声和性能影响重大,因此同时建立吸气消音器的三维声场和内流场数值模型,采用声学有限元及FW-H气动声学模型分别计算其声学特性,并基于流体力学瞬态计算监测消音器出口流量.采用该多物理场数值分析方法对某款定速压缩机的吸气消音器建立了优化方案,最后通过整机实验测试对仿真结果进行了验证.研究结果表明,优化方案的实测噪声在400 Hz～1250 Hz和2500 Hz～6300 Hz频段都有显著的改善,最大优化幅值达4 dB(A),噪声总值降低约2 dB(A),性能测试结果较原方案也有较大提升,制冷量提高7.8 W(约5%),COP提升0.021,有效验证了吸气消音器声功率级、气动噪声和CFD数值分析模型的准确性,该综合分析方法能够准确指导吸气消音器的正向设计及优化.
Abstract
The suction muffler of reciprocating compressor has a great influence on the noise and performance of the compressor.Therefore,a three-dimensional sound field model and internal flow field model of the suction muffler are established.The acoustic finite element model and FW-H aeroacoustics model are used to calculate its acoustic characteristics respectively.At the same time,the outlet flow of the muffler is monitored based on fluid mechanics transient calculation.The optimal scheme of the suction muffler of a reciprocating compressor is established by using the multi-physical field numerical analysis method and the simulation results are verified by experimental tests finally.The results show that the measured noise of the optimized scheme is better in the 400 Hz～1250 Hz and 2500 Hz～6300 Hz frequency bands,the maximum optimized amplitude is 4 dB(A)and the total noise is reduced by 2 dB(A).The performance test results are also greatly improved compared with the original scheme,the cooling capacity is increased by 7.8 W(about 5%)and the COP is increased by 0.021,which effectively verifies the accuracy of the sound power level,aerodynamic noise and CFD numerical analysis model of the suction muffler.Therefore,the comprehensive analysis method can better guide the forward design and optimization of the suction muffler.
关键词
往复式压缩机/吸气消音器/气动噪声/声功率级Key words
Reciprocating compressor/Suction muffler/Aerodynamic noise/Sound power level引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据