摘要
以Nusselt理论为基础,结合修正的膜理论,对含湿混合气体横掠水平翅片管外时的翅片表面对流冷凝传热机理进行研究。建议了分区处理方法,建立了翅片侧壁和光管上的液膜流动和传热模型。得到了管壁温度、烟气进口温度和雷诺数对总凝结液量的影响,以及翅片侧壁液膜的厚度分布。
It is significant to know the distribution and flow of condensate on the fin surface directly for comprehending the mechanism of condensation and the calculation of liquid film.Visualization experiment of condensation over a horizontal fin tube is performed.Based on the measurements,the diameter of the condensate drop on the fin surface was measured by image processing software.The law of distribution and flow of condensate drop was obtained.
出处
《热科学与技术》
CAS
CSCD
2010年第4期295-301,共7页
Journal of Thermal Science and Technology
基金
国家"863"计划资助项目(2006AA5Z228)
北京市自然科学基金资助项目(3083026)
关键词
混合气体
凝结传热
水平翅片管
凝结液量
mixed gas
condensation heat transfer
horizontal fin tube
condensate
