Ambient Tracer-LIF for 2-D quantitative measurement of fuel concentration in gas jets
Ambient Tracer-LIF for 2-D quantitative measurement of fuel concentration in gas jets
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Ambient Tracer-LIF 用于气体喷射中燃料浓度的二维定量测量
DOI：
10.1016/j.energy.2019.01.026
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发表时间：
2019-03
期刊：
影响因子：
9
通讯作者：
Weiquan Shi
中科院分区：
文献类型：
--
作者：
Zhifei Zhang;Tie Li;Weiquan Shi
本文提出了一种新的环境示踪激光诱导荧光技术，在环境气体中加入示踪剂，用于定量测量高压气体射流中燃料的二维浓度分布。首先，介绍了环境示踪激光诱导荧光技术的基本原理，并根据环境荧光强度推导了射流中燃料浓度的计算公式。在环境示踪剂-LIF技术中，可以执行现场校准，并且在原则上可以实现示踪剂或目标燃料的选择的更大的自由度。然后，在光学可达定容容器中，将高压气体注入掺杂丙酮的环境中进行实验。通过使用266 nm激光诱导环境中的荧光，并通过ICCD相机记录。通过对图像的处理，减少了图像的不确定性，得到了定量的燃油浓度分布。分析了测量结果的不确定度，包括系统误差和随机误差。不确定度传播分析表明，测量不确定度随局部燃料浓度的降低而增大，在射流边界区域，即混合气过稀区域，相对不确定度高达26%。最后，给出了燃气射流中燃油浓度分布的时间变化规律，并讨论了喷射压力的影响。这些结果对数值模型的建立和燃烧系统的设计具有参考价值。
A novel ambient tracer LIF technique with addition of tracer into ambient gas is proposed in this study to quantitatively measure the two dimensional (2-D) fuel concentration distribution in high-pressure gas jets. Firstly, the fundamental principle of the ambient tracer-LIF technique is described, and the equation of fuel concentration in a jet is deduced from the ambient fluorescence intensity. In the ambient tracer-LIF technique, the on-site calibration can be performed, and much more degrees of freedom in selection of tracers or target fuels can be achieved in principle. Then, the experiments are carried out with the high pressure gas injected into the environment doped with acetone in an optical accessible constant volume vessel. The fluorescence in the ambient is induced by using the 266 nm laser, and is recorded by the ICCD camera. The dedicated image processing is implemented to reduce the uncertainty and obtain the quantitative fuel concentration distribution in the jet. The uncertainties of the measurement results are evaluated, including both the systematic and random errors. The uncertainty propagation analysis shows that the measurement uncertainty increases with the local fuel concentration decreasing, and at the boundary regions of the jet, where the mixture is over lean, the relative uncertainty goes up to 26%. Finally, the temporal variations of the fuel concentration distribution in the gas jet are presented, and the effects of injection pressure are discussed. These results are believed to be valuable for development of numerical models and combustion system designs.
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影响因子：
2.4
作者：
V. A. Miller
通讯作者：
V. A. Miller
DOI：
10.1007/s003400050799
发表时间：
1999-09
期刊：
Applied Physics B
影响因子：
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作者：
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通讯作者：
M. Thurber;R. Hanson
DOI：
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发表时间：
1994-04
期刊：
Applied Physics B
影响因子：
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通讯作者：
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DOI：
10.4271/2008-01-1073
发表时间：
2008-04
期刊：
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影响因子：
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作者：
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通讯作者：
B. Williams;P. Ewart;R. Stone;Hongrui Ma;H. Walmsley;R. Cracknell;R. Stevens;D. Richardson;J. Qiao;S. Wallace
影响因子：
9
作者：
C. Wen;Xuewen Cao;Yan Yang;Wenlong Li
通讯作者：
C. Wen;Xuewen Cao;Yan Yang;Wenlong Li