Computed Tomography of Chemiluminescence (CTC): High resolution and instantaneous 3-D measurements of a Matrix burner
Computed Tomography of Chemiluminescence (CTC): High resolution and instantaneous 3-D measurements of a Matrix burner
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DOI：
10.1016/j.proci.2010.06.015
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发表时间：
2011-01-01
影响因子：
3.4
通讯作者：
Kempf, A. M.
中科院分区：
文献类型：
--
作者：
Floyd, J.;Kempf, A. M.
化学发光计算机断层扫描 (CTC) 是一种诊断技术，可提供有关火焰几何形状和激发态物质浓度的即时 3D 信息。该技术使用计算机断层扫描 (CT) 根据相机图像形式的化学发光积分测量重建 3D 化学发光强度场。 CTC 传感器已在由 21 个层流扩散喷射火焰组成的甲烷-氧气矩阵燃烧器中使用经济实惠的商用相机进行了演示。从 48 个视图获得的高分辨率 3-D 重建显示与观察到的火焰形状非常一致，并且分辨波长约为 220 μm。这足以捕获多个火焰锋面，表明 CTC 对于褶皱湍流火焰的适用性。使用 10 个同步相机测量进行的瞬时 3D 重建也显示出与观察到的火焰形状良好的一致性，并且可以容忍相机位置的误差。曝光时间短至 62 微秒的测量结果表明，其信噪比对于成功的断层扫描重建来说绰绰有余。 CTC 的明显应用是测量（瞬时）火焰表面密度、起皱系数、火焰法线方向和可能的热释放，以及瞬态发展的观察。 (C) 2010 年燃烧研究所。由爱思唯尔公司出版。保留所有权利。
Computed Tomography of Chemiluminescence (CTC) is a diagnostic technique that provides instantaneous 3-D information on flame geometry and excited species concentrations. The technique reconstructs the 3-D chemiluminescence intensity field using Computed Tomography (CT) from integral measurements of chemiluminescence in the form of camera images. The CTC sensor has been demonstrated for a methane-oxygen Matrix burner consisting of 21 laminar diffusion jet flames using affordable commodity cameras. High resolution 3-D reconstructions obtained from 48 views show good agreement with the observed flame shape and resolve wavelengths of approximately 220 mu m. This is sufficient to capture the multiple flame fronts, showing the suitability of CTC for wrinkled turbulent flames. Instantaneous 3-D reconstructions using 10 simultaneous camera measurements also show good agreement with the observed flame shape and are seen to be tolerant of error in the camera location. Measurements with exposure times as short as 62 mu s were found to achieve more than sufficient signal-to-noise ratios for successful tomographic reconstructions. Obvious applications for CTC are the measurement of (instantaneous) flame-surface density, wrinkling factor, flame normal direction, and possibly heat release, as well as the observation of transient developments. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.