竖直波形板折角处液膜破裂研究  

Study on Water Film Breakdown Phenomenon at Vertical Corrugated Plate Corner

作　　者：王博 田瑞峰 Wang Bo;Tian Ruifeng(Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin University of Engineering,Harbin,150001,China)

机构地区：[1]哈尔滨工程大学核安全与仿真技术国防重点学科实验室

出　　处：《核动力工程》2019年第6期20-23,共4页Nuclear Power Engineering

摘　　要：通过对曲线坐标系下2维边界层的纳维-斯托克斯(N-S)方程与连续性方程的推导,并结合定义无量纲量的方法,建立了液膜破裂模型,得出了一种波形板折角处的液膜临界破膜速度的理论计算方法;开展了液膜破裂实验研究,利用平面激光诱导荧光技术与图像处理方法分析了临界破膜速度与液膜厚度的关系。实验与模型计算结果均表明:波形板折角处的临界破膜速度与液膜厚度呈负相关关系;当液膜厚度相同时,波形板临界破膜结构参数越大,其临界破膜速度亦越大,利于气水分离效率的提高。Through the liquid film rupture model and the reduce of Navier-Stokes(N-S) equation and continuity equation for the 2-dimensional boundary layer in the curvilinear coordinate system, with non-dimension definition, the theory method for calculating the critical airflow velocity of water film breakdown is obtained;and, applying the Planar Laser Induced Fluorescence(PLIF) method and image processing method, the relationship between the water film thickness and the critical airflow velocity of water film breakdown is investigated through the water film breakdown experiment. Both experimental and theoretical calculation results show that the critical airflow velocity of water film breakdown is negatively correlated with the water film thickness. With the same water film thickness, the larger the critical breakdown structure parameter of corrugated plate dryer is, the greater the critical airflow velocity of water film breakdown is, which is beneficial to the improvement of the steam-water separation effect.

关 键 词：波形板干燥器 液膜厚度测量 破裂特性 临界气流速度 

分 类 号：TK173[动力工程及工程热物理—热能工程]