非定常流动激光诊断技术研究

项目名称： 非定常流动激光诊断技术研究

项目编号： No.11272337

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 杨富荣

作者单位： 中国空气动力研究与发展中心

项目金额： 78万元

中文摘要： 非定常复杂流动一直是流体力学领域研究的重点和难点，发展先进的非定常流动测试技术，开展复杂流动显示与测量实验研究，解决实验流体力学中的前沿问题，是该领域研究学者目前努力的重要方向。本项目针对目前我国实验流体力学领域对非定常复杂流动显示与测量技术的需要，拟通过对用于超声速、高超声速非定常复杂流动速度脉动定量测量的高时间分辨激光干涉瑞利散射技术，用于高温流场二维平面瞬态温度场定量测量的分子滤波瑞利散射测温技术，用于高速流场特定平面流动情况及其演化规律流动显示的高速片光散射技术等一些先进的激光诊断技术开展深入研究，在国内建立一套先进的非定常流动测试技术，形成一定的非定常流动测量能力，为复杂流动演化规律和机理的研究提供新的测试技术手段。

中文关键词： 瑞利散射；温度；速度；流动显示；测量

英文摘要： Study of the complex unsteady flow is not only a important problem but also difficult problem in the field of aerodynamics and experiment fluid mechanics. Flow visualization and measurement techniques have been playing a substantial role in fluid experiment, for it is intuitional and has no interference to the flow field. It is necessary for researchers to develop some available unsteady flow visualization and measurement technique to study complex flow phenomena, acquire physical laws, establish the model of new flow phenomena, solve the frontier issues on the experimental fluid mechanics. In this project, a list of advanced laser diagnostics technique will be developed: A Rayleigh scattering technique will be developed to measure gas velocity in high speed flows at high sampling rates, filtered Rayleigh scattering thermometry will be studied to accomplish two dimension transient temperature quality measurement in the high temperature flow field, a high-speed laser light sheet technique will be used to obtain sequential images of unsteady flows. With the help of these non-intrusive laser diagnostics techniques, lots of unsteady flow visualization and measurement experiment results will be obtained for the flow mechanisms research.

英文关键词： Rayleigh scattering；temperature；velocity；flow visualization；measurement