IN-24-C052 - Parametric Analysis on Mitigation of Aerodynamic Noise Generated by Gas Discharge Process of Rolling Piston Compressor

High pressure gas discharged from compression chamber of rolling piston compressor is exhaled from discharge port into cavity within compressor shell. This periodic process involves pressurized turbulent gas flowing through structural components, during which turbulent forces can form into aerodynamic noise and the interaction between fluid and compressor shell can induce vibration and consequently noise. In former works done by the authors, numerical analysis was conducted to establish a comprehensive approach for investigation of aerodynamic noise generated by gas discharge process. A simulation model combined multiple physical processes, such as compressor thermodynamic performance, fluid dynamics, structural vibration and sound radiation, was developed to study aerodynamic noise. In this paper, these numerical tools were utilized to explore how does design parameters impact noise generation. Variable of parameters relevant to aerodynamic noise were studied in the work. Effects on noise generation of modifying these parameters were discussed and mechanisms behind the phenomena were analyzed. Methodology developed in this research can be beneficial in understanding compressor noise generation mechanism, and can be generalized to apply on studies of other types of hermetic compressor. Results of parametric study can provide guidance to manufactures in order to optimize compressor design and mitigate noise.