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쇼케이스 백패널 개공율 구조의 최적화 및 토출부 반경에 따른 수치해석
공명근(Myung Keun Gong),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.11
This study was carried out to confirm the effect of passive flow control applying the radius to the discharge portion and the back panel open ratio. The simulation proceeded with a 2D-steady turbulent flow and numerical analysis was performed on the two cases. The evaluation index of the vertical open showcase can be represented by the entrainment factor. The entrainment factor is the ratio of cooling air to ambient air entering the suction. The first simulation was conducted for the case where the radius was applied to the discharge portion and the case where the radius was not applied to the discharge portion. It was confirmed that a dead zone occurs in the honeycomb region when the radius is not applied to the discharge portion. However, if the radius is applied to the discharge portion, the dead zone in the honeycomb region can be eliminated. As a result, it was confirmed that the entrainment factor decreased by 11% when the radius was applied to the discharge portion. The second simulation was to find the optimal conditions by changing the back panel open ratio. As a result, it was confirmed that the back panel open ratio remained at a similar level at 3.96% or more.
Round flow control을 통한 개방형 쇼케이스에 관한 수치해석 연구
공명근(Myung Keun Gong),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
Numerical method was used to assess the energy consumption of vertical open showcase with flow control. Two studies were conducted by applying radius to vertical open showcase. The working fluid was air (Pr = 0.7) and the Reynolds number was 6000 ≤ Reω ≤ 8000. The energy consumption were used to evaluate the improvement of vertical open showcase. As a result it was confirmed that the energy consumption decreased by 10% at radius 40mm. Also, the radius 50mm decreased by 11% more than the Basic open showcase.