摘要
为分析比较不同材质基底上冷却液膜的流动传热特性,提出一种抛物线形波纹基底,并且分析了不同材料物性对这种新的基底上冷却液膜流动传热特性的影响。利用FLUENT软件,对选用不同材料基底时液膜的温度场进行数值模拟;采用选取特征点的方法,得到了各特征点上的速度分布,漩涡强度,熵,雷诺数(Re),流函数,以及焓等物理参数并绘制相应分布图;结合上述数值摸拟和各分布图,对陶瓷、铝和玻璃钢材质上液膜的流动传热特性进行对比分析。结果表明,不同的材料物性对新波纹基底上冷却液膜的流动传热特性有不同程度的影响,在上述3种材料中换热效果最好的为陶瓷。
In order to analyze and compare the flow and heat transfer characteristics of the cooling liquid film falling down the substrate made of different material, a parabolic corrugated substrate was presented, and the influence of physical properties of the different materials on the characteristics of cooling liquid film falling down the new corrugated substrate was analyzed. The temperature fields of the liquid film were simulated by using FLUENT software. And then, the feature points on the film were selected, and the parameters such as velocities, vorticity magnitude, entropy, Reynolds number （Re）, stream function and the enthalpy for each feature point were obtained and plotted , Combining with the numerical simulation and the distribution graphs for the physical parameters, the flow and heat transfer characteristics of cooling liquid film for the ceramic, aluminum, and glass fiber reinforced plastic （FRP） on the new corrugated substrate were compared and analyzed. The results show that different material properties have different degrees of influence on flow and heat transfer characteristics of cooling liquid film falling down the new corrugated substrate, and the ceramic material is the best one for the heat exchange efficiency in the three materials.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第35期6311-6318,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(10672056)
中央高校基本科研业务费专项资金项目(10MG33
2014MS110)~~
关键词
不同材料
波纹基底
冷却液膜
流动传热特性
数值模拟
different materials
wavy substrates
cooling liquid film
flow and heat transfer characteristics
numerical simulation
