| 基于图像处理的湍流轴对称火焰体积与表面积计算方法 |
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| 引用本文： | 吴雪娇,崔嵛,李立明,程旭东,张和平.基于图像处理的湍流轴对称火焰体积与表面积计算方法[J].火灾科学,2012,21(2):92-97. |
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| 作者姓名： | 吴雪娇 崔嵛 李立明 程旭东 张和平 |
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| 作者单位： | 中国科学技术大学火灾科学国家重点实验室,安徽合肥,230027 |
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| 基金项目： | 阂家科技支撑计划课题项目 |
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| 摘 要： | 基于"圆柱体法"思想设计出轴对称火焰的火焰体积和表面积计算公式,以25cm×25cm正庚烷油池火为例,采用灰度阈值法提取其火焰区域,进而计算轴对称火焰的体积和表面积,并讨论灰度阈值对火焰区域提取、火焰体积与表面积计算的影响。结果表明:本文所述方法可以简便地计算湍流轴对称火焰的火焰体积和表面积;火焰体积与表面积随灰度阈值增大而减小且灰度阈值变化对火焰体积的影响幅度约为对火焰表面积影响幅度的两倍。
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| 关 键 词： | 火焰体积 火焰表面积 圆柱体法 灰度阈值 图像处理 |
| 收稿时间： | 2012/3/10 0:00:00 |
| 修稿时间： | 4/2/2012 12:00:00 AM |
Calculation of turbulent axisymmetrical flame volume and surface area based on image processing |
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| WU Xue-jiao,CUI Yu,LI Li-ming,CHENG Xu-dong and ZHANG He-ping.Calculation of turbulent axisymmetrical flame volume and surface area based on image processing[J].Fire Safety Science,2012,21(2):92-97. |
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| Authors: | WU Xue-jiao CUI Yu LI Li-ming CHENG Xu-dong and ZHANG He-ping |
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| Institution: | (State Key Laboratory of Fire Science, University of Science and Technology of China, hefei 230027,China) |
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| Abstract: | A formula is developed to calculate the volume and surface area for axisymmetrical turbulent flame. The flame region is extracted from the video of heptane pool fire using the gray-level threshold method, and then to calculate flame volume and surface area. The method results in effective calculations, and the flame volume and surface area decrease with increasing gray threshold. The effect of the gray threshold on the calculation of flame volume is nearly tvciee as much as that for flame surface area. |
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| Keywords: | Flame volurne Flame surface area Cylinder method Gray-level threshold Image processing |
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