压缩机吸气消声器的声学和阻力特性研究
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摘要
吸气消声器主要用于减弱制冷剂吸入压缩部分时产生的进气噪声。针对目前用于往复式压缩机吸气消声器消声频带窄、中高频消声效果不佳的特点,设计出一种多腔室组合的消声器,可综合考虑消声器的声学性能和流体性能。在Pro/E中建模完成后,将模型导入ANSYS ICEM CFD中划分网格,在声学仿真软件中分别对最初的和新设计后的消声器进行声学仿真。比较两种消声器的传递损失,数值仿真结果显示,新设计的消声器低频消声效果有所降低,中高频消声效果良好,整体消声量提高。最后在Fluent中对消声器的流体性能进行仿真,以压力损失作为衡量流体性能的标准,得出在设计消声器时不能为了提高声学性能设计过多腔室的结论。
Suction muffler is mainly used to attenuate the intake noise generated when the refrigerant is sucked into the compressive part. Aiming at the characteristics of narrow muffler band and poor sound elimination effect in low and mid frequency ranges of the reciprocating compressor suction muffler, a multi-chamber combined muffler is designed which can consider the acoustic performance and fluid characteristics of muffler simultaneously. After the modeling in Pro/E is completed, the model is imported into the ANSYS ICEM CFD for meshing, and acoustic simulations of the original and newly designed mufflers are performed respectively in LMS. Virtual. Lab. The transmission losses of the two mufflers are compared. The numerical simulation results show that the newly designed muffler has a lower muffler effect in low frequency range, but has better muffler effects in middle and high frequency ranges and an overall muffler volume increase.Finally, the fluid performance of the muffler is simulated in Fluent code. Using the pressure loss as an index for fluid performance evaluation, it is concluded that using multi-cavity may not be suitable in the mufflers design to improve the acoustic performance.
Suction muffler is mainly used to attenuate the intake noise generated when the refrigerant is sucked into the compressive part. Aiming at the characteristics of narrow muffler band and poor sound elimination effect in low and mid frequency ranges of the reciprocating compressor suction muffler, a multi-chamber combined muffler is designed which can consider the acoustic performance and fluid characteristics of muffler simultaneously. After the modeling in Pro/E is completed, the model is imported into the ANSYS ICEM CFD for meshing, and acoustic simulations of the original and newly designed mufflers are performed respectively in LMS. Virtual. Lab. The transmission losses of the two mufflers are compared. The numerical simulation results show that the newly designed muffler has a lower muffler effect in low frequency range, but has better muffler effects in middle and high frequency ranges and an overall muffler volume increase.Finally, the fluid performance of the muffler is simulated in Fluent code. Using the pressure loss as an index for fluid performance evaluation, it is concluded that using multi-cavity may not be suitable in the mufflers design to improve the acoustic performance.
引文
[1]李伟男.往复式冰箱压缩机结构噪声分析以及降噪研究[D].杭州:浙江大学,2017:2-7.
[2]方丹群,张斌,孙家麒,等.噪声控制工程学[M].北京:科学出版社,2013:675-756.
[3]KIM SANGHYEON,CHEONG CHEOLUNG,PARKJAESEONG,et al.Investigation of flow and acoustic performances of suction mufflers in hermetic reciprocatingcompressor[J].International Journal of Refrigerations,2016(69):74-84.
[4]孔祥强,陈丽娟,李瑛.制冷压缩机排气管消声器声学及阻力特性仿真分析[J].农业工程学报农业工程学报,2015,31(5):59-62.
[5]韩宝坤,牛家鹏,阎成稳,等.冰箱压缩机吸气消声器声学特性分析[J].噪声与振动控制噪声与振动控制.2016,36(6):178-181.
[6]郭军丽,吴亚锋,徐俊伟,等.基于管道声模态的消声器传递损失计算[J].噪声与振动控制,2013,33(5):179-183.
[7]NAGARJUNA K,SREENIVAS K.Noise reduction in a reciprocating compressor by optimizing the suction muffler[J].International Journal of Engineering Trends&Technology,2014,16(6):276-281.
[8]KEE SEUNG,JIN WOO LEE.Two-step design process for optimal suction muffler in reciprocating compressor[J].Journal of Mechnical Science and Technology,2015,29(1):269-278.
[9]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 9098-2008电冰箱用全封闭型电动机-压缩机[S].北京:中国标准出版社,2008:2-16.
[2]方丹群,张斌,孙家麒,等.噪声控制工程学[M].北京:科学出版社,2013:675-756.
[3]KIM SANGHYEON,CHEONG CHEOLUNG,PARKJAESEONG,et al.Investigation of flow and acoustic performances of suction mufflers in hermetic reciprocatingcompressor[J].International Journal of Refrigerations,2016(69):74-84.
[4]孔祥强,陈丽娟,李瑛.制冷压缩机排气管消声器声学及阻力特性仿真分析[J].农业工程学报农业工程学报,2015,31(5):59-62.
[5]韩宝坤,牛家鹏,阎成稳,等.冰箱压缩机吸气消声器声学特性分析[J].噪声与振动控制噪声与振动控制.2016,36(6):178-181.
[6]郭军丽,吴亚锋,徐俊伟,等.基于管道声模态的消声器传递损失计算[J].噪声与振动控制,2013,33(5):179-183.
[7]NAGARJUNA K,SREENIVAS K.Noise reduction in a reciprocating compressor by optimizing the suction muffler[J].International Journal of Engineering Trends&Technology,2014,16(6):276-281.
[8]KEE SEUNG,JIN WOO LEE.Two-step design process for optimal suction muffler in reciprocating compressor[J].Journal of Mechnical Science and Technology,2015,29(1):269-278.
[9]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 9098-2008电冰箱用全封闭型电动机-压缩机[S].北京:中国标准出版社,2008:2-16.