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首页> 外文期刊>Optics Letters >Simultaneous three-dimensional velocimetry and thermometry in gaseous flows using the stereoscopic vibrationally excited nitric oxide monitoring technique
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Simultaneous three-dimensional velocimetry and thermometry in gaseous flows using the stereoscopic vibrationally excited nitric oxide monitoring technique

机译:使用立体振动激发一氧化氮监测技术同时进行气流中的三维测速和测温

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摘要

We present a demonstration of the simultaneous measurement of spatially resolved three-component velocity and temperature in gaseous flow fields using a variant of the vibrationally excited nitric oxide monitoring (VENOM) technique, based on planar laser induced fluorescence and molecular tagging velocimetry methods. Three-component velocity determinations were derived from two-dimensional molecular tagging velocity measurements employing sequential fluorescence image pairs obtained simultaneously by two cameras in stereoscopic configuration. Probing two different rotational states of nitric oxide (X-2 Pi, upsilon '' = 1), produced via fluorescence and collisional quenching from initial excitation to the A (2)Sigma(+) state, for the sequential velocimetry images allows simultaneous determination of the temperature field. Experimental measurements of velocity and temperature across an oblique shock result in mean values within 21 m/s for the three components of velocity and 20 K for planar temperature when compared to oblique shock calculations. (C) 2016 Optical Society of America
机译:我们展示了基于平面激光诱导荧光和分子标记测速方法,使用振动激发的一氧化氮监测(VENOM)技术的一种变型,同时测量气态流场中空间分辨的三分量速度和温度的演示。三分量速度测定是从二维分子标记速度测量结果中得出的,该测量使用了两个立体结构相机同时获得的连续荧光图像对。探测从初始激发到A(2)Sigma(+)状态通过荧光和碰撞猝灭产生的一氧化氮的两种不同旋转状态(X-2 Pi,upsilon''= 1),对于连续测速图像可以同时确定温度场与斜冲击计算相比,斜冲击的速度和温度的实验测量结果得出速度的三个分量的平均值在21 m / s之内,平面温度的平均值在20 K以内。 (C)2016美国眼镜学会

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