复杂几何结构环状流液膜界面特性与输运机制

Interfacial properties and transport mechanism of liquid film for annular flow in the local regions of complex geometry structure are crucial for the accurate prediction of local Dryout-CHF (critical heat flux) and the safety of the nuclear reactor system relevant devices and the nuclear reactor under accident conditions. This project will adopt the combined methods of experimental research and theoretical analysis to investigate the interfacial properties and transport mechanism of liquid film for annular flow in the local regions of complex geometry structure, in which annular flow experiments will be performed to illustrate the non-uniform distribution characteristics of liquid film and quantitatively analyze the discrepancies of liquid film thickness for the local regions. By considering the disturbance wave properties, which can be elucidated from the perspective of the formation mechanism of disturbance wave, a prediction model of gas-liquid interfacial shear stress is expected to be developed. In addition, the effects of interfacial shear stress on liquid film interface will be considered to reveal the interfacial transport mechanism. This project is focused on the liquid film properties of annular flow in the local regions of complex geometry structure, and to explore the effects of interfacial shear stress on the mass and momentum transport of liquid film interface. The aforementioned contents have not yet published on the international references so far.

复杂几何结构局部区域环状流液膜的界面特性与输运对准确预测局部区域Dryout型临界热流密度以及核反应堆系统相关元件和事故工况下反应堆的安全有重要意义。本项目拟采用实验研究和理论分析相结合的方法，研究复杂几何结构局部区域环状流液膜的界面特性与输运机制。通过开展复杂几何结构内的环状流实验，阐明局部区域液膜的不均匀分布特性，定量对比局部区域液膜厚度的差异；从液膜界面扰动波形成的机制出发，对液膜界面波动特性进行阐释，建立能描述液膜界面波动特性的气液界面剪切力模型；考虑气液界面剪切力对液膜界面的剪切作用，揭示包括液滴夹带与扰动波聚合在内的界面输运机制。本项目着眼于复杂几何结构局部区域的环状流液膜特性，探求气液界面剪切力对其界面的质量与动量输运的作用机制，上述内容在国际上还未见发表。

复杂几何结构局部区域环状流液膜的界面特性与输运对准确预测局部区域Dryout型临界热流密度以及核反应堆系统相关元件和事故工况下反应堆的安全有重要意义。本项目采用实验研究和理论分析相结合的方法，研究复杂几何结构局部区域环状流液膜的界面特性与输运机制。通过开展复杂几何结构内的环状流实验，阐明了局部区域液膜的不均匀分布特性，定量对比了局部区域液膜厚度的差异；从液膜界面扰动波形成的机制出发，对液膜界面波动特性进行了阐释，建立了能描述液膜界面波动特性的气液界面剪切力模型；考虑气液界面剪切力对液膜界面的剪切作用，揭示了包括液滴夹带与扰动波聚合在内的界面输运机制。本项目着眼于复杂几何结构局部区域的环状流液膜特性，探求了气液界面剪切力对其界面的质量与动量输运的作用机制。基于上述工作，发表期刊论文10篇，其中包括核工程顶级期刊《国际传热传质》7篇和核工权威期刊《核动力工程》1篇，申请发明专利2项，会议论文5篇，基金进展汇报口头报告1次，协助培养博士生2名，硕士生3名。