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流动显示和图像处理期刊
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN 打印: 1065-3090
ISSN 在线: 1940-4336

流动显示和图像处理期刊

DOI: 10.1615/JFlowVisImageProc.v6.i4.70
pages 333-342

A STUDY OF AIR FLOW CHARACTERISTICS IN THE REFRIGERATOR USING PIV AND COMPUTATIONAL SIMULATION

In Seop Lee
Home Appliance Research Lab, LG Electronics Inc., 327-23, Gasan-Dong, Keumchun-Gu, Seoul 153-023, Korea
Seung Jo Baek
Home Appliance Research Lab, LG Electronics Inc., 327-23, Gasan-Dong, Keumchun-Gu, Seoul 153-023, Korea
Moon Kee Chung
Home Appliance Research Lab, LG Electronics Inc., 327-23, Gasan-Dong, Keumchun-Gu, Seoul 153-023, Korea
Dong Ick Rhee
Home Appliance Research Lab, LG Electronics Inc., 327-23, Gasan-Dong, Keumchun-Gu, Seoul 153-023, Korea
Akikazu Kaga
Department of Environmental Engineering, Faculty of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
Katsuhito Yamaguchi
Department of Environmental Engineering, Faculty of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan

ABSTRACT

It is necessary to understand the characteristics of the circulating air flow inside the household refrigerator in order to reduce energy consumption and find the optimal chilled air distribution within it. To investigate the air flow precisely, particle image velocimetry (PIV) was used to visualize the flow field, and a computational simulation was also conducted. For the visualization experiment, the airflow issuing from two major entrance ports in the frozen food compartment model (made of transparent acrylic resin plate) was visualized by a Nd:YAG pulsed laser light sheet, and a number of flow images were processed by the grey level difference method. A study to obtain turbulence statistics was also performed, and results of the mean velocity field were compared with the computational results. For the computational simulation, a 3D-CAD modeler (UniGraphics) was used to generate a full geometry of the frozen food compartment and the grid generation, and simulations were carried out by a commercial fluid dynamics program, FLUENT, with an RNG k−ε turbulence model. The results of the two approaches showed similar flow fields and revealed that the secondary flow, developed from the initial region of the entrance ports, may play an important role in the real (chilled) flow distribution.


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