Numerical Investigation on Flow and Heat Transfer Performance of Supercritical Carbon Dioxide Based on Variable Turbulent Prandtlnumber Model

作     者：Xiaokai LIU Haiyan ZHANG Keyong CHENG Xiulan HUAI Haiyan LIAO Zhongmei ZHANG 

作者机构：Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100049China Nanjing Institute of Future Energy SystemNanjing 210000China CHN Energy New Energy Technology Research Institute CO.LTD.Beijing 102206China 

出 版 物：《Mechanical Engineering Science》 (机械工程（英文）)

年 卷 期：2021年第3卷第2期

页      面：1-8页

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Supercritical carbon dioxide Turbulent Prandtl number Flow and heat transfer Field synergy principle Numerical investigation 

摘      要：Flow and heat transfer characteristic of supercritical carbon dioxide(SCO_(2))are numerically investigated in the horizontal and vertical *** turbulent Prandtl number model could well describe the behavior of SCO_(2) affected by the *** the cooling condition,the heat transfer performance of SCO_(2) along the upward direction is best and that along the downward direction is worst when bulk fluid temperatures are below the pseudocritical *** the ratio of heat flux to mass flux could decrease the difference of convective heat transfer coefficient in three flow *** the heating condition,heat transfer deterioration only occurs in vertical upward and horizontal flow *** transfer deterioration of SCO_(2) could be delayed by increasing the mass flux and the deterioration degree is weakened in the second half of tube along the vertical upward flow *** with the straight tube,the corrugated tube shows better comprehensive thermal performance.