壁面润湿性对液滴撞击曲面的动力学过程影响研究

项目名称： 壁面润湿性对液滴撞击曲面的动力学过程影响研究

项目编号： No.51476017

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 刘晓华

作者单位： 大连理工大学

项目金额： 83万元

中文摘要： 液滴撞击曲面是一个复杂的动态变化过程，表面润湿性对其有着重要的影响，致使产生显著的、不可忽略的界面效应，与其相关的表面现象和传递特征的研究是一个重要的基础问题。现有关于润湿性对液滴撞击曲面过程影响的研究较少。本项目提出针对壁面润湿性对液滴撞击曲面的动力学过程的影响进行研究，采用实验观测、理论分析和模拟计算相结合的手段，探索液滴撞击不同润湿性曲面过程中非均匀力势场作用下的界面效应、尺度效应和温度效应，全面评价润湿性能与液滴形态演变之间的本征关系，揭示液滴形态及其内部的微细传递过程与不同润湿性影响下的固-液-气三相间作用力之间的非线性作用规律及其物理机制，提出复杂力势作用下的液滴撞击不同润湿性曲面的动态演变理论。

中文关键词： 润湿性；液滴撞击；曲面；界面效应；微细传递

英文摘要： Droplet impact on curved surfaces is a complex dynamic process. Surface wettability is an important influencing factor, which can lead to conspicuous and non-negligible interface effects. The related study on the surface phenomenon and the transmission characteristics is an important foundation issue. The existing research on the wettability effects of droplet impact on curved surfaces is less. This project focuses on the study of surface wettability effects on the kinetic characteristics during the droplet impacting on curved surfaces. Experimental tests, theoretical analysis, and simulation are used to explore the interface effect, scale effect and temperature effect in the uneven force potential field. The intrinsic relationship between the wettability and the shape evolvement of the droplet will be evaluated comprehensively. The physical mechanism between different droplet morphology, which is affected by internal subtle mass transfer, and the interaction of solid-liquid-gas phase caused by wettability would be revealed. Finally, a dynamic evolution theory about droplet impact on curved surfaces with different wettability will be carried out.

英文关键词： Wettability;Droplet Impact;Curved Surface;Interface Effect;Subtle Mass Transfer