燃烧加热风洞污染问题的水蒸气跟踪测量研究

项目名称： 燃烧加热风洞污染问题的水蒸气跟踪测量研究

项目编号： No.11202204

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 金熠

作者单位： 中国科学技术大学

项目金额： 30万元

中文摘要： 在高超声速地面模拟试验中，燃烧加热风洞受到广泛应用。这种加热方法在具有加热功率大，投资和运行成本相对低廉等明显优势的同时，也不可避免地产生有别于空气的成分，即试验气流中存在污染组分（如水蒸气等），污染组分将会在试验过程中施加额外影响，使得地面试验结果偏离实际情况。本项目采用在激波风洞中添加污染物的方法产生污染来流条件，进行不同污染组分含量影响的对比实验。以近红外可调谐半导体激光器吸收光谱测量系统（TDLAS）结合壁压、纹影以及激光诱导荧光等方法为诊断手段，以水蒸气在风洞喷管及试验模型（如超燃冲压发动机燃烧室模型）流动过程中的跟踪测量为突破点，关注多流场参数如水蒸气含量、温度的空间分布和演变过程, 分析和研究污染组分、含量与高速试验气流参数、超声速可燃流场点火及燃烧特性之间的关系，在污染影响的机理、规律和定量化方面获得新的认识，同时在多种测量手段间的相互关联和挖掘诊断潜力方面进行有益探索。

中文关键词： 污染；水蒸气；凝结；吸收光谱；

英文摘要： Combustion-heated wind tunnel has been widely used in hypersonic ground tests.The Combustion-heated method has the obvious advantage of high heating power, relatively low investment and operating costs. But it will inevitably produce the component different from atmospheric air,that is to say, contaminants exist in the testing airflow(such as steam, etc.).The contaminants will exert additional physical and chemical effects in the testing process and make the ground test results deviate from the actual situation. In the project vitiated airstream is produced through the way of adding contaminants in the shock tunnel and the comparative experiments with different mole fraction of contaminants are made. Tunable Diode Laser Absorption Spectroscopy measurement system (TDLAS) combined with the wall pressure measurement,schlieren photography and laser-induced fluorescence detection are used to diagnose complex flow field information. The steam tracking measurement in the flow process of the wind tunnel nozzle and test models (such as scramjet combustor model)is made as the breakthrough point.The spatial distribution and the evolution process of multi-flow field parameters such as steam mole fraction and temperature are concerned. Then the relationship between the type and the mole fraction of the contaminants, and

英文关键词： Vitiation；Steam；Condensation；Absorption spectrum；