来流速度对防冰表面溢流水流动换热的影响  

Influence of free stream velocity on runback water flow and heat transfer on anti-icing surface

作　　者：郑梅[1] 董威[1] 朱剑鋆[1] 郭之强[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《空气动力学学报》2016年第3期295-301,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(11272212;11572195);国家重点基础研究发展计划(2015CB755800)

摘　　要：为研究来流速度对防冰表面溢流水流动形态及换热的影响,基于空气-水两层相互作用的质量、动量和能量守恒,建立防冰表面溢流水水膜流动换热及破裂的数学模型,分析了防冰表面溢流水在不同来流条件下的流动形态和表面换热情况。计算分析表明:来流速度增加时,防冰表面相同位置处的连续水膜厚度减小,水膜破裂位置随之延后;较高来流速度条件下,破裂处水膜厚度稍有增加,使得破裂后形成的溪流厚度和宽度增大;作为主要的表面散热项,连续水膜表面蒸发及对流换热热流均随来流速度的增加而增大。此外,由水膜破裂引起的表面溢流水流态变化对防冰表面蒸发热流有一定影响。The purpose of this paper is to investigate the effect of free stream velocity on therunback water flow and heat transfer on the anti-icing surface. Based on the mass, momentumand energy conservations of the runback water flow and the air flow ？ a mathematical model of therunback water film flow and rivulet flow was developed to investigate the effect of the free streamvelocity on the heat and mass transfer on the anti-icing surface. The computation analysisindicates that the water film thickness at the same position on the anti-icing surface decreaseswith the free stream velocity increasing, and the rivulet thickness and width at the breakup pointincrease due to larger water film thickness at higher free stream velocity. Meanwhile, as themainheat losses on the anti-icing surface？ the evaporation heat flux and the convection heat flux on thewater film surface increase with the free stream velocity increasing. In addition, thecharacteristics of the heat and mass transfer on the dry surface, the fully wet surface and thepartially wet surface were also investigated. The results show that the patterns of the runbackwater have some influence on the heat and mass transfer on the anti-icing surface.

关 键 词：防冰 溢流水 流动换热 水膜 来流速度 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]