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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental uncertainty of measured entropy production with pulsed laser PIV and planar laser induced fluorescence
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Experimental uncertainty of measured entropy production with pulsed laser PIV and planar laser induced fluorescence

机译：脉冲激光PIV和平面激光诱导荧光测量的熵产生的实验不确定性

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摘要

The article develops an uncertainty analysis for a newly measured variable of local entropy production. Entropy production is measured with post-processing and spatial differencing of measured velocities from particle image velocime-try (PIV), as well as temperatures obtained from planar laser induced fluorescence (PLIF). Measurement uncertainties of fluid velocity depend on the time interval between laser pulses, width of the camera view and other factors. Bias errors are related to elementary bias components and sensitivity coefficients in the uncertainty analysis. The precision errors use a confidence coefficient of 2 for a 95% confidence interval. The newly developed measurement technique and uncertainty analysis are successfully applied to pressure-driven channel flow and buoyancy-driven free convection in a square enclosure.
机译：本文对新近测得的局部熵产生变量进行了不确定性分析。熵产生是通过对粒子图像测速（PIV）以及从平面激光诱导荧光（PLIF）获得的温度进行后处理和测得的速度的空间差异进行测量的。流体速度的测量不确定性取决于激光脉冲之间的时间间隔，摄像机视图的宽度以及其他因素。偏差误差与不确定性分析中的基本偏差分量和灵敏度系数有关。精度误差在95％置信区间内使用2的置信系数。新开发的测量技术和不确定性分析已成功应用于方形外壳中压力驱动的通道流量和浮力驱动的自由对流。

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