가전 냉장고 Ice-fan 유로 시스템의 유동과 소음 성능 개선에 관한 수치적/실험적 고찰

다국어 초록 (Multilingual Abstract)

With increasing demand for high-quality refrigerators, noise has been recognized as one of the primary performance indicators. Fans are one of the highest contributing noise sources. Various types of fans are used in refrigerators. In particular, ice-making fans generate more noise as they operate irregularly, and the associated noise may be transmitted directly through the piping system outside the refrigerator. In this study, the flow and noise performances of a centrifugal ice-making fan unit and its piping system are investigated. First, a virtual fan tester based on CFD techniques was developed and its validity was verified by comparing the predicted results with experimental data obtained from an actual fan tester. The predicted sound pressure spectrum was also compared with the corresponding experimental spectrum. We observed good agreement between the two results in terms of blade passing frequency components. For a quantitative evaluation of the performances of the ice-making fan unit and its piping system, the energy flux through the pipe and radiated noise levels from the system were computed and analyzed as indicators of the flow and noise performances, respectively. From the analysis results, certain parts of the pipe were identified to have the most adverse effects on the performances, and the related flow fields were analyzed in detail. Based on our analysis, a new design is proposed to improve the performance of ice-making fan units. The new design resulted in a reduction of the energy loss and vortex of the internal flow, and an increase in the volume flow rate of the unit by approximately 1.1 %.

참고문헌 (Reference)

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