Investigation on noise of rotary compressors using fluid-structure interaction
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Air conditioners consist of heat exchangers, fans, motors and compressors as major components. From the viewpoint of noise, the compressor occupies a very large portion. In this study, rotary compressor which is mainly used in domestic air conditioner was discussed. The noise generated from the rotary compressor can be classified into pressure pulsation of the refrigerant and structural vibration. During the operation of the compressor, the behavior of the refrigerant and the internal structure of the compressor strongly interact with each other. Therefore, an integrated interpretation is required when analyzing from the viewpoint of refrigerant. In this study, the rotary compressor behavior is implemented using the FSI technique and the noise and valve behavior with and without discharge muffler are analyzed.
KeywordsRotary compressor Fluid-structure interaction Muffler Noise Reed valve
Matrix of effective suface
Matrix of mass
Matrix of damping
Initial thickness of the oil
Thickness of the oil
Outer seat diameters
Inner seat diameters
Sound pressure level
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This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20194030202300). In addition, this research was also supported by a joint project between LG Electronics and Seoul National University in 2015–2016.
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