过冷大水滴结冰试验相似准则研究

项目名称： 过冷大水滴结冰试验相似准则研究

项目编号： No.11472296

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 易贤

作者单位： 中国空气动力研究与发展中心

项目金额： 90万元

中文摘要： 过冷大水滴（简称SLD）泛指直径大于50微米的过冷水滴。由于SLD结冰耦合了水滴变形、破碎、飞溅等动力学过程以及传质、传热和相变的非线性热力学过程，导致现有的小水滴结冰试验相似准则不再适用于SLD结冰试验。本项目将采用理论分析、数值计算和结冰风洞实验相结合的手段，对SLD结冰过程进行系统研究和分析，目的是掌握SLD结冰试验相似准则的基础理论，建立一套科学、合理的SLD结冰试验相似准则，为结冰风洞试验提供理论指导和参数选取依据。主要研究内容有：（1）SLD结冰基本物理过程的研究与建模；（2）相似参数的提炼及影响规律；（3）相似准则的构建及试验参数的计算方法；（4）相似准则的评估、验证和应用。本项目的研究基于SLD结冰的物理机理，既有数理建模、公式推导等基础性研究，又有结冰预测、结冰风洞试验参数选取等应用性研究，研究成果可直接满足结冰风洞试验的工程需求，具有重要的学术研究价值和工程应用前景。

中文关键词： 飞机结冰；过冷大水滴；结冰风洞；相似准则；结冰试验

英文摘要： Supercooled Large Droplets (SLD) are commonly referred to the water droplets with the diameter larger than 50 microns. Ice accretion due to SLD is very different from which due to small-diameter water droplets. One of the typical reason is the effects of dynamic process of large droplets, such as the breakup and splashing phenomena and so on. Another reason is that the characteristics of heat and mass transfer during SLD icing are different from those of small water droplets icing, and there is a non-linear thermodynamic process during SLD icing. As a result, the icing test scaling law based on small supercooled water droplets can't be used in the test of SLD icing. In the present project, the scaling law of SLD icing test will be systematically investigated, and a combination method of theoretical analysis, numerical calculation and icing wind tunnel test will be adopted in the study. The goal of the project is to propose a SLD icing scaling law, which is rational and can be used in icing wind tunnel test as the theoretic basis for the selection of test parameters. The main work includes four parts: (1) The investigation into the physics process of SLD icing. (2) The abstraction of the similar parameters. (3) The construction of a SLD icing scaling law and the method for calculating icing test parameters. (4) The Evaluation, validation and application of the SLD icing scaling law. The research is based on the study of physical mechanism of SLD icing. It includes not only fundamental research such as mathematical modeling, formula derivation, but also applied research such as icing calculation and selection of icing test parameters. The results and progress of the work can be directly applied to the engineering requirements of icing wind tunnel test, which indicates the achievements of the current project have great value of science as well as good potentials of being used in engineering.

英文关键词： aircraft icing;supercooled large droplets;icing wind tunnel;icing scaling law;icing test