具有弯曲气液界面的蒸发相变体系的多场测量

项目名称： 具有弯曲气液界面的蒸发相变体系的多场测量

项目编号： No.11302236

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 朱志强

作者单位： 中国科学院力学研究所

项目金额： 28万元

中文摘要： 蒸发效应在微电子制冷、自组装新材料制备、新医药检测和空间热能机械等新兴行业领域正得到足够的重视和广泛应用，其过程涉及复杂的热质输运机理。对于具有弯曲气液界面的小尺度蒸发相变体系（液滴、弯月面等），实验观测手段的缺失和不适用限制了对于蒸发传热机理的深入认识，亟需发展新实验技术拓展前人工作和满足多物理参量测量需求。本申请将以上述弯曲界面蒸发相变体系为研究对象，从硬件适用性和软件判读等方面优化PIV、红外热成像技术和界面外形分析技术，克服弯曲界面的光学折射导致流速测量误差和观测范围不覆盖全场、红外热成像图像测量对象判读不准确和温度场反演精度不高导致影响实验目标、界面外形演化测量误差大等问题，完成一套适用于上述蒸发体系的多场测量系统，实现液体内部热对流流场、气液界面温度场、平均蒸发速率和接触角演化等多物理量的定量观测，并用之开展蒸发与热毛细对流耦合影响体系热质传输的实验研究。

中文关键词： 相变效应；热对流；弯曲气液界面；红外热成像；界面形貌

英文摘要： Evaporation effect has been given more and more studying interests due to its wide application in new emerging industries, such as microelectronics cooling, self-assembly materials, new medical testing and thermal engineering in space, during which complex heat and mass transfer mechanisms are involved. For the small-scale evaporation system with curved vapor-liquid interface, more applicable experimental technologies are greatly needed to perform measurements of multi-physical parameters, in order to expand previous researches and deepen the mechanisms understanding of evaporating heat transfer. In present proposal, we focus on the abovementioned evaporation systems with curved vapor-liquid interface. For the purpose of constructing an experimental system for multi-fields measurement applying in the evaporating system, we plan to optimize experimental technologies including particle image velocimetry (PIV), infrared thermography and image processing for the morphology of vapor-liquid interface, and try to overcome the encountered difficulities and errors for experimental measurements as following: (1) Deviation of flow rate and absence of the entire flow field caused by the refraction at the curved interface; (2) Deviation of the investigating objects and converted temperature value for the interpretation from

英文关键词： Phase change effect；Thermal convection；Curved vapor-liquid interface；Infrared thermography；Interface morphology