摘要
为研究平行流热管的工作机理,基于FLUENT软件中的VOF模型编写了蒸发冷凝相变的UDF程序,对不同功率下平行流热管管内两相流动和传热过程进行了数值模拟研究。模拟结果显示了初始阶段平行流热管管内的气液分布,启动阶段管内泡状流、弹状流、环状流等复杂流型的转变过程,稳定工作阶段工质在各并联管路中互激振荡流动过程。在高加热功率下,管内工质的互激振荡流动更为剧烈,热量输送距离更远。研究结果为平行流热管换热器的优化设计提供了参考依据。
In order to study the working mechanism of the parallel flow heat pipe,the numerical simulations of two phase flow and heat transfer processes in parallel flow heat pipe under different power were carried out with FLUENT based on the Volume of Fluid model and the User-Defined Function program of evaporation-condensation phase transformation.The results exhibit the gas-liquid distribution in the initial stage of the parallel flow heat pipe,the complex gas-liquid flow pattern transformation such as bubble flow,slug flow and annular flow in the start-up phase,and the mutual exchange oscillating flow heat transfer of working fluid in each parallel pipeline under steady working conditions.The high heating power improves the oscillating flow rate of the working fluid and the heat transfer capacity of the heat pipe in the axial direction.The study provides guidelines for the optimal design of parallel flow heat pipe heat exchangers.
作者
沈超
王竹萱
刘玉娟
张东伟
杨建中
SHEN Chao;WANG Zhuxuan;LIU Yujuan;ZHANG Dongwei;YANG Jianzhong(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2023年第4期358-364,共7页
Journal of Thermal Science and Technology
基金
河南省科技攻关资助项目(192102310244)
国家自然科学基金资助项目(51706208)
河南省高等学校供热空调重点学科开放实验室开放研究课题资助项目(2017HAC107)。
关键词
热管
流动传热
数值模拟
heat pipe
heat transfer and flow
numerical simulation
