Control of noise generated from centrifugal refrigeration compressor

• Published in: Mechanical systems and signal processing Vol. 152; p. 107466
• Main Authors: Mao, Yijun, Fan, Chuang, Zhang, Zhiping, Song, Shigong, Xu, Chen
• Format: Journal Article
• Language: English
• Published: Berlin Elsevier Ltd 01-05-2021; Elsevier BV
• Subjects: Absorbers; Acoustic noise; Algorithms; Centrifugal compressor; Centrifugal compressors; Coherence analysis; Design parameters; Generic algorithm; Micro-perforated panel; Multilayers; Noise; Noise control; Noise reduction; Pipes; Refrigeration; Sound pressure; Sound transmission; Vibration; Generic algorithm; Vibration; Coherence analysis; Micro-perforated panel; Centrifugal compressor; Noise
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2020.107466

•The compressor noise is mainly radiated from the vibration of the outlet pipe.•ATA is superior to AEA in predicting acoustic impedance of the multi-layer MPPA.•Double-layer MPPA suppresses both the pipe vibration and the compressor noise.
Vibration and noise characteristic of two-stage centrifugal compressors used in refrigeration system is studied experimentally. Experimental results of vibration acceleration, sound pressure spectra and their coherence indicate that the compressor noise is dominated by tonal components at discrete frequencies and is mainly radiated from the vibration of the outlet pipe of the compressor. Therefore, a multi-layer micro-perforated panel absorber fixed at the outlet pipe is employed to attenuate the compressor noise, where acoustic transmission analysis and generic algorithm are combined to design optimal geometry parameters of the absorber. Experimental results confirm that the designed micro-perforated panel absorber can effectively reduce the noise of the centrifugal refrigeration compressor.