【作者】 王晟； 刘晶儒； 胡志云； 张振荣； 张立荣； 叶景峰； 赵新艳； 黄梅生；

【Author】 Wang Sheng,Liu Jingru,Hu Zhiyun,Zhang Zhenrong,Zhang Lirong,Ye Jingfeng, Zhao Xinyan,Huang Meisheng (Northwest Institute of Nuclear Technology,P.O.Box 69,Xi’an 710024,P.R.China.)

【机构】 西北核技术研究所；

【摘要】 分子过滤瑞利散射技术是采用分子过滤器改变流场本身分子弹性散射光谱形状实现燃烧流场热力学参数和速度测量的一种光学诊断技术。本文阐述了分子过滤瑞利散射技术的基本理论,在分析分子过滤器的工作原理和碘分子吸收光谱形成机理和光谱特征基础上,选择碘蒸汽作为532nm时分子过滤瑞利散射技术的过滤物质。采用分子过滤瑞利散射技术实验系统对稳定场火焰进行了诊断,得到CH4/air预混火焰的温度和密度场分布。采用该技术对超音速高温流场进行了诊断,得到了激光作用区流场结构的初步诊断结果。更多还原

【Abstract】 Molecular Filtered Rayleigh Scattering(FRS) technique is one sort of laser diagnostic techniques that use molecular absorption filter to modify the frequency spectrum of radiation scattered by flow field constituents in order to measure properties of the flow field.In this paper,FRS basic theory was described.On the base of analyzing work principle of molecular filter cell,form mechanism and feature of iodine molecular absorption spectrum,iodine vapor was selected as filter substance.FRS was built up,and methane/air premixed flame was diagnosed.The 2-Dimension temperature and density fields were obtained.FRS technique was researched for diagnosing temporally supersonic high temperature flow and the turbulence structures on the area of laser action were achieved.更多还原