Development of a non-intrusive radiative heat flux measurement for upward flame spread using DSLR camera based two-color pyrometry
Development of a non-intrusive radiative heat flux measurement for upward flame spread using DSLR camera based two-color pyrometry
复制标题
DOI：
10.1016/j.combustflame.2019.08.042
复制
发表时间：
2019-12-01
影响因子：
4.4
通讯作者：
DesJardin, Paul E.
中科院分区：
文献类型：
--
作者：
Aphale, Siddhant S.;DesJardin, Paul E.
采用双色高温计对聚甲基丙烯酸甲酯（PMMA）沿沿着向上火焰传播的正面和侧面图像进行测量，发展了一种非侵入式火焰-燃料表面辐射热流测量技术。市售尼康DSLR相机进行辐射校准，以测量烟尘温度从红色和绿色通道的彩色图像使用双色高温计。本文提出了一种三维射线追踪算法来计算从炭黑火焰到固体燃料表面的辐射热流。将计算的热通量与位于样品中心的对流校正的施密特-伯尔特热通量测量值进行比较，结果显示在+/-65%范围内。据作者所知，这项研究是第一次尝试开发一种非侵入式辐射热流测量使用DSLR相机和双色高温计。利用计算的热通量值估算的火焰高度与目视观察和文献中报道的先前测量结果非常一致。(C)2019燃烧研究所爱思唯尔公司出版All rights reserved.
A non-intrusive flame to fuel surface radiative heat flux measurement technique is developed using two-color pyrometry of front and side images of upward flame spread along poly(methyl methacrylate) (PMMA). Commercially available Nikon DSLR cameras are radiometrically calibrated to measure soot temperature from the red and green channels of the color images using two-color pyrometry. A 3D ray tracing algorithm is developed to compute radiative heat flux from a sooting flame to the solid fuel surface. Computed heat fluxes are compared to convection corrected Schmidt-Boelter heat flux measurements located at the center of the sample and are shown to be within +/- 65%. To the authors' knowledge, this study is the first attempt to develop a non-intrusive radiative heat flux measurement using DSLR cameras and two-color pyrometry. Flame height estimates using the computed heat flux values are in good agreement with visual observations and prior measurements reported in the literature. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.