Simultaneous temperature and 2D velocity measurements in a turbulent heated jet using combined laser-induced fluorescence and LDA
Simultaneous temperature and 2D velocity measurements in a turbulent heated jet using combined laser-induced fluorescence and LDA
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DOI：
10.1007/s003480050294
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发表时间：
1999-03-01
影响因子：
2.4
通讯作者：
Lebouche, M
中科院分区：
文献类型：
--
作者：
Lemoine, F;Antoine, Y;Lebouche, M
本文提出了一种描述湍流热输运特性的有效方法。该方法是基于荧光的温度依赖性，由激光辐射诱导的有机染料。将激光诱导荧光技术与二维激光多普勒测速技术相结合，以在同一样品体积中同时瞬时测量温度和速度。该技术被证明在一个湍流加热的圆形射流：平均和波动的动态和热场进行了研究，并确定温度-速度互相关，以表征湍流扩散率和湍流普朗特数。
This paper presents an efficient technique for the characterization of thermal transport properties in turbulent flows. The method is based on the temperature dependence of fluorescence, induced by laser radiation, of an organic dye. The laser-induced fluorescence technique is combined with 2D laser Doppler anemometry, in order to measure in the same sample volume simultaneously and instantaneously the temperature and velocity. The technique is demonstrated on a turbulent heated round jet: the mean and fluctuating dynamic and thermal fields are investigated, and the temperature-velocity cross-correlations are determined in order to characterize the turbulent diffusivity and the turbulent Prandtl number.