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Experiment design for investigations on noise generated by discharge refrigerant gas pulsations in hermetic compressors.

Number: 1393

Author(s) : CUI Y., HE D., ZIVIANI D., LIU Y.

Summary

Noise and vibration control of hermetic compressors is an important consideration in the compressor design process to meet noise standard requirements and to improve products’ user satisfaction. Noise can be generated from vibrating components, which may yield to structural failures, as well as from internal fluid motion of refrigerant gas. The current work focuses on experiment design to obtain both thermodynamic and vibroacoustic measurements needed for investigations on flow-induced noise generated by the periodic discharge gas pulsations resulted from the rolling piston compression’s operation. A pressure chamber with optical access has been manufactured and utilized to investigate gas-pulsation noise generation mechanism, the behavior of discharge valve as well as the interaction among the thermodynamic compression process, the valve motion and acoustic field in the discharge cavity. In order to mimic the valve motion of an actual operating compressor, a hot-gas bypass (HGB) system has been used to generate typical in-cylinder pressure-temperature profiles to lift the valve installed in the manufactured pressure chamber. A laser Doppler vibrometer (LDV) was used to measure the vibrating valve motion. Measurement data can be used to validate gas pulsation noise and vibration simulation models and can help researchers as well as compressor manufacturers to gain a deeper understanding of the physical mechanisms related to the generation, propagation, and radiation of gas-pulsation noise in hermetic compressors.

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Pages: 9 p.

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  • Original title: Experiment design for investigations on noise generated by discharge refrigerant gas pulsations in hermetic compressors.
  • Record ID : 30030316
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

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