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3D flame topography obtained by tomographic chemiluminescence with direct comparison to planar Mie scattering measurements

机译：通过层析化学发光获得的3D火焰形貌，与平面Mie散射测量值直接比较

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摘要

This work reports the measurements of 3D flame topography using tomographic chemiluminescence and its validation by direct comparison against planar Mie scattering measurements. Tomographic measurements of the 3D topography of various well-controlled laboratory flames were performed using projections measured by seven cameras, and a simultaneous Mie scattering measurement was performed to measure a 2D cross section of the 3D flame topography. The tomographic measurements were based on chemiluminescence emissions from the flame, and the Mie scattering measurements were based on micrometer-size oil droplets seeded into the flow. The flame topography derived from the 3D tomographic and the Mie scattering measurement was then directly compared. The results show that the flame topography obtained from tomographic chemiluminescence and the Mie measurement agreed qualitatively (i.e., both methods yielded the same profile of the flame fronts), but a quantitative difference on the order of millimeters was observed between these two methods. These results are expected to be useful for understanding the capabilities and limitations of the 3D tomographic and Mie scattering techniques in combustion diagnostics. (C) 2015 Optical Society of America
机译：这项工作报告了使用断层化学发光法对3D火焰形貌进行的测量，并通过与平面Mie散射测量值进行直接比较进行了验证。使用七个摄像头测量的投影对各种控制良好的实验室火焰的3D形貌进行断层扫描测量，并同时进行Mie散射测量以测量3D火焰形貌的2D横截面。层析成像的测量是基于火焰的化学发光，而米氏散射的测量是基于注入到气流中的微米级油滴。然后直接比较了从3D层析成像和Mie散射测量得出的火焰形貌。结果表明，从断层化学发光和Mie测量获得的火焰形貌在质量上是一致的（即两种方法产生的火焰锋面轮廓相同），但是在这两种方法之间观察到了数量级的毫米级差异。预期这些结果将有助于理解燃烧诊断中3D层析成像和Mie散射技术的功能和局限性。 （C）2015年美国眼镜学会

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