| 圆柱钝体绕流火焰旋涡特性研究 |
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| 引用本文： | 关胜晓,周建军,余彪,王清安,范维澄.圆柱钝体绕流火焰旋涡特性研究[J].火灾科学,1995,4(3):82-88. |
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| 作者姓名： | 关胜晓 周建军 余彪 王清安 范维澄 |
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| 作者单位： | 中国科学技术大学;中国科学技术大学;中国科学技术大学;中国科学技术大学;中国科学技术大学 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 在森林火灾中各种旋涡大量存在。本文着重研究圆柱钝体绕流火焰旋涡的形成机理和特征。通过各种实验手段观测火焰在圆柱钝体周围的动态结构变化，建立了涡核半径的模型公式。实验结果同时表明，在低能量火的情形下圆柱钝体的存在使得火蔓延速率下降，因而提出一个新的阻力因子模型以修正顺流燃烧蔓延速率。
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| 关 键 词： | 圆柱钝体 火焰旋涡 蔓延速率 |
Study on Characteristics of Fire Vortices in Flow Past Cylindrical Bodies |
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| GUAN Sheng-xiao,ZHOU Jian-jun,YU Biao,WANG Qing-an and FAN Wei-cheng.Study on Characteristics of Fire Vortices in Flow Past Cylindrical Bodies[J].Fire Safety Science,1995,4(3):82-88. |
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| Authors: | GUAN Sheng-xiao ZHOU Jian-jun YU Biao WANG Qing-an and FAN Wei-cheng |
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| Institution: | University of Science and Technology of China;University of Science and Technology of China;University of Science and Technology of China;University of Science and Technology of China;University of Science and Technology of China |
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| Abstract: | Various vortices are produced in forest fires.This paper will emphasis on the firevortices formation mechanics and characteristics in flow past cylindrical bodies, Changesof the unsteady structure around the bodies were observed by different experimentalmethods. The modeling equations for the vortex core radius were founded as well, Ex-perimental resuIts show that the fire spread rate is reduced when cylindrical bodies ex-ist. So a new resistant factor model was raised based on this discovery which is used tocorrect down-wind flame spread rate. |
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