原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2013年
11期
2009-2013
,共5页
非能动安全壳冷却系统%辐射换热%自然对流%Fluent
非能動安全殼冷卻繫統%輻射換熱%自然對流%Fluent
비능동안전각냉각계통%복사환열%자연대류%Fluent
passive containment cooling system%radiation heat transfer%natural convec-tion%Fluent
本文建立了1∶10的二维钢制安全壳外侧辐射换热和自然对流模型，并用先进流体计算软件Fluent对流场进行计算，得到了完整流道下的速度流场、钢制安全壳上封头顶部的空气速度矢量图，并得出钢制安全壳上封头顶部存在空气滞留区的结论。分析了通道宽度、空气进流速度及壁面黑度对通道换热的影响，结果表明：适当的通道宽度和空气进流速度均能提高通道的换热和换热效率；壁面黑度的提高能明显增强钢制安全壳上封头处的辐射换热。
本文建立瞭1∶10的二維鋼製安全殼外側輻射換熱和自然對流模型，併用先進流體計算軟件Fluent對流場進行計算，得到瞭完整流道下的速度流場、鋼製安全殼上封頭頂部的空氣速度矢量圖，併得齣鋼製安全殼上封頭頂部存在空氣滯留區的結論。分析瞭通道寬度、空氣進流速度及壁麵黑度對通道換熱的影響，結果錶明：適噹的通道寬度和空氣進流速度均能提高通道的換熱和換熱效率；壁麵黑度的提高能明顯增彊鋼製安全殼上封頭處的輻射換熱。
본문건립료1∶10적이유강제안전각외측복사환열화자연대류모형，병용선진류체계산연건Fluent대류장진행계산，득도료완정류도하적속도류장、강제안전각상봉두정부적공기속도시량도，병득출강제안전각상봉두정부존재공기체류구적결론。분석료통도관도、공기진류속도급벽면흑도대통도환열적영향，결과표명：괄당적통도관도화공기진류속도균능제고통도적환열화환열효솔；벽면흑도적제고능명현증강강제안전각상봉두처적복사환열。
A 1∶10 2D model of radiation heat transfer and natural convection outside the 2D steel containment was established in this paper .The advanced computational fluid dynamic analysis software Fluent was applied to complete the calculation . The velocity nephogram and the velocity vector diagram on the head of steel containment were obtained ,and the results show that there is an air stagnant zone on the head of steel containment .The influence of channel width ,airflow speed and emissivity of wall surface on heat transfer was studied as well .The appropriate channel width and airflow speed can enhance the heat transfer and the efficiency of heat exchange .T he increase of the emissivity of wall surface can obviously improve the radiation heat transfer on the head of steel containment .
