摘要
分析了在重力热管内加内螺纹的方法 ,研究了重力热管的冷凝段的传热及流动状况 .在合理假设的基础上运用动量和能量方程对热管进行理论分析 ,导出了在热流密度 q一定时 ,凝结液膜厚度δ沿壁面x变化的函数关系 ,并用计算机模拟求解 ,再应用传热方程计算出局部换热系数αx 和总换热系数α .研究表明 。
The heat transfer and flow pass condensation segment in the gravity heat pipe with inner screw thread were investigated. The heat pipe was analyzed theoretically with the momentum and energy equation on the base of the rational presumptions. An equation of the thickness of liquid film δ and the coordinate point x was educed on the condition that the heat stream density q is the constant. The equation was solved by the way of computer simulation. The local heat exchange coefficient α x and the average heat exchange coefficient α were calculated with the heat transfer equation according to the thickness of liquid film δ. The conclusion is drawn that substituting the slick inner wall heat pipe with the inner screw thread heat pipe is useful in intensified heal transfer.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2002年第8期68-70,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
内螺纹
重力热管
冷凝段
计算机模拟
强化传热
inner screw thread
gravity heat pipe
condensation segment
computer simulation
intensification of heat transfer