海洋摇摆条件下超临界二氧化碳传热特性的数值研究  

Numerical investigation on heat transfer of supercritical CO_2 in rolling motion

作　　者：赵振兴[1] 林原胜[1] 张克龙[1] 刘洲洋[1] 

机构地区：[1]武汉第二船舶设计研究所热能动力技术重点实验室,武汉430064

出　　处：《中国科学院大学学报（中英文）》2018年第2期280-288,共9页Journal of University of Chinese Academy of Sciences

基　　金：湖北省自然科学基金(2016CFA019)资助

摘　　要：对海洋摇摆条件和静止条件下超临界流体传热特性进行数值研究。结果表明,摇摆条件对拟临界区流体传热特性的影响远大于对单相流体和远离拟临界区的超临界流体的影响。摇摆条件导致壁面传热系数的周期性振荡,且有助于抑制传热恶化现象。当超临界流体温度远离拟临界温度后,摇摆条件对超临界流体的传热过程的影响显著减小。随着摇摆周期减小或者摇摆振幅增大,传热恶化现象逐渐减弱。The numerical calculations with and without rolling motion are carried out to investigate the effects of rolling motion on flow and heat transfer of supercritical CO2. It is concluded that the effect of rolling motion on the supercritical CO2 is much stronger than that on conventional singlephase fluid. The rolling motion causes the periodic oscillation of the local heat transfer coefficient and suppresses the whole heat transfer deterioration. As the supercritical CO2 temperature increases,the influence of rolling motion on the heat transfer decreases markedly. The heat transfer deterioration phenomenon gradually weakens as the rolling period decreases or rolling amplitude increases.

关 键 词：摇摆条件 数值模拟 传热特性 超临界流体 

分 类 号：TL331[核科学技术—核技术及应用]