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
王彦红 1邵璋 1王艳杰2
作者信息
- 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
- 折叠
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.
Abstract
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 trans-fer under these three heated modes are studied.The effect of operating pressure on heat transfer is dis-cussed.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 ab-sorbed 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Key words
supercritical-pressure/methane/heat transfer deterioration/buoyancy effect/secondary flow intensity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据