A three-color absorption/scattering imaging technique for simultaneous measurements on distributions of temperature and fuel concentration in a spray
A three-color absorption/scattering imaging technique for simultaneous measurements on distributions of temperature and fuel concentration in a spray
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一种三色吸收/散射成像技术，用于同时测量喷雾中的温度和燃料浓度分布
DOI：
10.1007/s00348-018-2525-0
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发表时间：
2018-03
影响因子：
2.4
通讯作者：
Yuyin Zhang
中科院分区：
文献类型：
--
作者：
Wenyuan Qi;Yuyin Zhang
提出了一种三色成像技术，用于同时测量蒸发喷雾中燃油/空气混合物温度和燃油蒸气/液体浓度的分布。该想法基于蒸汽浓度与蒸汽对UV光的吸收成比例，液相浓度与由于液滴对可见光的散射而引起的消光有关，并且混合物温度可以与两个吸收波长或窄带处的吸光度比相关。为了验证成像系统，在一个专门设计的校准室中，在不同温度（423-606 K）和压力（3.6 bar）下，测量了对二甲苯在三个窄带（中心波长分别为265、289和532 nm，半高宽为10 nm）处的摩尔吸收系数。结果表明，对二甲苯在两个紫外波长中心的两个窄带处的摩尔吸光系数之比对混合物温度敏感。另一方面，燃料蒸气/液体浓度的分布可以通过使用由于蒸气的紫外吸收和液滴的可见光散射而引起的吸收来获得。将这两种方法结合起来，可以实现混合气温度分布和油气浓度分布的同时测量。此外，由于吸收系数依赖于温度，由两个吸收窄带的比值得到的温度场还可进一步用于提高汽液浓度的测量精度。该诊断应用于高温高压定容室内的蒸发喷雾。
A three-color imaging technique was proposed for simultaneous measurements on distributions of fuel/air mixture temperature and fuel vapor/liquid concentrations in evaporating sprays. The idea is based on that the vapor concentration is proportional to the absorption of vapor to UV light, the liquid-phase concentration is related to the light extinction due to scattering of droplet to visible light, and the mixture temperature can be correlated to the absorbance ratio at two absorbing wavelengths or narrow bands. For verifying the imaging system, the molar absorption coefficients ofp-xylene at the three narrow bands, which were centered respectively at 265, 289, and 532 nm with FWHM of 10 nm, were measured in a specially designed calibration chamber at different temperatures (423–606 K) and pressure of 3.6 bar. It was found that the ratio of the molar absorption coefficients ofp-xylene at the two narrow bands centered at the two UV wavelengths is sensitive to the mixture temperature. On the other hand, the distributions of fuel vapor/liquid concentrations can be obtained by use of absorbance due to ultraviolet absorption of vapor and visible light scattering of droplets. Combining these two methods, a simultaneous measurement on distributions of mixture temperature and fuel vapor/liquid concentrations can be realized. In addition, the temperature field obtained from the ratio of the two absorbing narrow bands can be further used to improve the measurement accuracy of vapor/liquid concentrations, because the absorption coefficients depend on temperature. This diagnostic was applied to an evaporating spray inside a high-temperature and high-pressure constant volume chamber.
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DOI：
10.1007/s003400000383
发表时间：
2000
期刊：
Applied Physics B
影响因子：
--
作者：
S. Einecke;Christof Schulz;Volker Sick
通讯作者：
S. Einecke;Christof Schulz;Volker Sick
DOI：
10.4271/2007-01-1892
发表时间：
2007-07
期刊：
--
影响因子：
--
作者：
Yuyin Zhang;Y. Kotani;A. Yoshida;K. Nishida
通讯作者：
Yuyin Zhang;Y. Kotani;A. Yoshida;K. Nishida
影响因子：
2.4
作者：
M. Thurber;R. Hanson
通讯作者：
M. Thurber;R. Hanson
影响因子：
1.9
作者：
F. R. Westlye;Keith Penney;Anders Ivarsson;L. Pickett;J. Manin;S. Skeen
通讯作者：
F. R. Westlye;Keith Penney;Anders Ivarsson;L. Pickett;J. Manin;S. Skeen
影响因子：
2.4
作者：
H. Fujimoto;Dae Choi;Yuta Shima;J. Senda
通讯作者：
H. Fujimoto;Dae Choi;Yuta Shima;J. Senda