二维温度分布结合可调谐半导体激光吸收光谱技术与计算机断层扫描技术,通过获得与实验值最适应的拟合光谱,重构本生灯燃烧火焰二维温度分布.以零均值归一化互相关和误差平方和作为指标,分析了32路测量组件的二维重构精度.结果表明,零均值归一化互相关达到0.994,误差平方和达到0.000 86.采用32路测量系统实现了本生灯火焰二维...
We measured methane (CH4) concentration distribution in a semiconductor process chamber by using the computed tomography-tunable diode laser spectroscopy (CT-TDLAS). We designed the CT-TDLAS measurement system with a 32-laser-path. The CH4 concentration distribution was measured by the CT-TDLAS bas...
a combustion engine, through which the performance of the newly proposed 6-peaks algorithm has been demonstrated theoretically and experimentally.It is highly expected that the proposed algorithm will be the most appropriate approach for calculating the temperature and concentration fields in CT-TDLAS.Doo...
CT-TDLAS (computed tomography-tunable diode laser absorption spectroscopy) is one the leading techniques for the measurements of temperature and concentration fields of the gases. In CT-TDLAS, the accuracies of the measurement results are strongly dependent upon the reconstruction algorithms. In this ...
Among them, computed tomography-tunable diode laser absorption spectroscopy (CT-TDLAS) is the most important technique for measuring the distributions of temperature and concentration across the two-dimensional planes. This study suggests a three-dimensional measurement to consider the irregular flow of ...
In the CT-TDLAS technique, it is essential to set the wavelength for target gases. There is a limit to high-temperature measurement in temperature estimation using a single laser-specific wavelength. Therefore, compared measurement performance was made using a mixed type laser (1388 nm, 1343 nm...
In this paper, a 32-path 2D CT-TDLAS system for temperature measurement in a pilot-scale coal-fired furnace was developed. The accuracy of the CT algorithm in the reconstruction of 2D temperature distributions in different laser-path arrangements was first analyzed using the sum of squared ...
With this method, networks of intersecting path-integrated concentration measurements are obtained through the air at several heights over an area using the TDLAS system. CT algorithms process the measurements as they are obtained in real-time to reconstruct 3D chemical concentration maps. This ...
UnivMin-GyuUnivDeguchiUnivYoshihiroUnivKamimotoUnivTakahiroUnivApplied thermal engineering: Design, processes, equipment, economicsM. G. Jeon, Y. Deguchi, T. Kamimoto, D. H. Doh, and G. R. Cho, "Performances of new reconstruction algorithms for CT-TDLAS (computer tomography-tunable diode laser ...
6-peaks algorithmA new reconstruction algorithm for a computed tomography-tunable diode laser absorption spectroscopy (CT-TDLAS) proposed for the measurements of two-dimensional temperature and concentration distribution of a gas flame. The characteristic wavelengths near 1388 nm where water vapor was ...