Experimental Study on Flame Wander of Small-scale Fire Whirl based on Video Image Analysis

2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE) Pub Date : 2019-10-01 DOI:10.1109/ICFSFPE48751.2019.9055760

Pengfei Wang, Xuanya Liu, Longfei Chen

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Abstract

In this work, the flame displacement data along horizontal direction in small-scale fire whirl due to flame wander was extracted by the method of video image analysis, by which the appearance probability of flame center along horizontal direction and frequency of flame wander were calculated, respectively. Linear correlation between frequency data and flame circulation is still achieved in this work, and is compared with that obtained by particle image velocimetry (PIV) method in small-scale fire whirl and that obtained by video image analysis in medium-scale fire whirl in the previous work. The comparisons show that the linear correlation between the frequency of flame wander and flame circulation is independent of flame size, but the linear coefficient of the correlation is related to the flame size. And from the comparison, it can be also found that under the case of the same flame circulation, the frequency of flame wander in small-scale fire whirl is faster than that in medium-scale fire whirl.

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基于视频图像分析的小尺度火焰旋涡火焰漂移实验研究

本文采用视频图像分析的方法提取了小尺度火焰旋转中由于火焰漂移引起的火焰沿水平方向的位移数据，计算出火焰中心沿水平方向出现的概率和火焰漂移出现的频率。本文仍然实现了频率数据与火焰循环之间的线性相关，并与以往小尺度火焰漩涡中粒子图像测速(PIV)方法和中尺度火焰漩涡中视频图像分析方法得到的频率数据进行了比较。对比表明，火焰徘徊频率与火焰循环之间的线性相关关系与火焰尺寸无关，但相关系数与火焰尺寸有关。通过对比还可以发现，在相同火焰循环的情况下，小尺度火旋风的火焰徘徊频率要快于中等规模火旋风。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)

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