方形通道内超临界甲烷换热数值研究  

Numerical Research on Heat Transfer of Supercritical Methane in a Horizontal Square Channel

作　　者：王彦红 邵璋 王艳杰 WANG Yanhong;SHAO Zhang;WANG Yanjie(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China;School of Electrical and Computer Science,Jilin Jianzhu University,Changchun 130018,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012 [2]吉林建筑大学电气与计算机学院,吉林长春130018

出　　处：《山东航空学院学报》2024年第4期47-54,共8页Journal of Binzhou University

基　　金：吉林省教育厅科技项目(JJKH20220100KJ);吉林省高教学会高教科研课题(JGJX2023D242)。

摘　　要：基于火箭发动机再生冷却运用,对非对称热流施加于外表面顶部、侧面、底部方形通道中超临界压力甲烷的流动换热进行了数值研究。探究了三种加热模式下的换热特性和换热机理,以及运行压力对换热的影响机制。提出了通道周向平均换热预测关联式。结果表明,类膜态沸腾是传热恶化的原因,相比于顶部加热和底部加热两种模式,侧面加热时管道截面具有最大的二次流速度和强度,提高运行压力有助于更多的热流被加热侧内壁面吸收,更少的热流传递到其他内壁面。Based on the rocket engine regenerative cooling application,the flow and heat transfer of supercritical-pressure methane in a square cooling channel with asymmetric heating on the top,bottom,and side outer-walls have been numerically investigated.The characteristic and mechanism of heat transfer under these three heated modes are studied.The effect of operating pressure on heat transfer is discussed.The prediction correlation for average heat transfer in the channel circumferential direction is proposed.The results show that the pseudo-film boiling leads to the heat transfer deterioration.There are the largest secondary flow velocity and intensity in the side heated mode compared with other two heated conditions.Increasing the operating pressure helps the greater proportion of heat flux to be absorbed by the heated inner-wall,and less heat flux is transmitted to other inner-walls.

关 键 词：超临界压力 甲烷 传热恶化 浮升力作用 二次流强度 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]