传热管外液体流动数值模拟研究

摘要

In this paper, the process of the liquid flow on the heat tube surface was carried out using computational fluid dynamics (CFD) simulation method. Based on the three-dimensional grid model, the flow profile and the spread morphology of the liquid on the tube surface, the film thickness distribution and the keeping time of the liquid around the tube were investigated under different density of liquid distribution. The simulated result was coordinated with the experimental work, and it will be very helpful for better understanding the liquid flow process of falling film, as well as the design and optimization of the evaporator.%采用计算流体力学方法(CFD),对传热管外液体流动过程进行了模拟研究.建立了传热管三维网格模型,考察了不同布液密度下液体在传热管表面铺展形态、流型、液膜厚度以及绕管停留时间的变化规律.该研究结果对于加深理解降膜流动过程,指导蒸发器优化设计和工艺条件优化有一定的借鉴意义.