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낮은 Pe 수에서 액체금속 전열관 다발 직교유동의 열전달 상관식에 대한 수치적 평가
김남형(Namhyeong Kim),최재현(Jae Hyun Choi),신성민(Seong Min Shin),이수원(Su Won Lee),조항진(HangJin Jo) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The heat transfer correlation for a cross-flow of liquid metal over a rod bundle was numerically evaluated at low Peclet number. The two-dimensional unsteady Reynolds-averaged Navier-Stokes simulation was conducted, and the algebraic heat flux model was used for the closure of turbulent heat flux. The numerical simulation results were compared with the Kalish and Dwyer’s experiment, and it was confirmed that the results well followed the Kalish-Dwyer correlation within the applicable range, unlike the case of using the simple gradient diffusion hypothesis as the turbulent heat flux model. Based on the simulation results for the Peclet number of 10 – 40, it was shown that the heat transfer performance was well predicted by the existing Kalish-Dwyer correlation even at the lower Peclet number than the applicable range. This study allows the prediction of heat transfer in liquid metal cross-flow under the low Peclet number conditions.
낮은 Pe 수에서 액체금속 전열관 다발 직교유동의 열전달 상관식에 대한 수치적 평가
김남형(Namhyeong Kim),최재현(Jae Hyun Choi),신성민(Seong Min Shin),이수원(Su Won Lee),조항진(HangJin Jo) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The heat transfer correlation for a cross-flow of liquid metal over a rod bundle was numerically evaluated at low Peclet number. The two-dimensional unsteady Reynolds-averaged Navier-Stokes simulation was conducted, and the algebraic heat flux model was used for the closure of turbulent heat flux. The numerical simulation results were compared with the Kalish and Dwyer’s experiment, and it was confirmed that the results well followed the Kalish-Dwyer correlation within the applicable range, unlike the case of using the simple gradient diffusion hypothesis as the turbulent heat flux model. Based on the simulation results for the Peclet number of 10 – 40, it was shown that the heat transfer performance was well predicted by the existing Kalish-Dwyer correlation even at the lower Peclet number than the applicable range. This study allows the prediction of heat transfer in liquid metal cross-flow under the low Peclet number conditions.