| 富燃料丙烷/空气预混火焰特性的微重力实验研究 |
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| 引用本文： | 袁莉,王双峰,Jarosinski J,Gorczakowski A,Podfilipski J.富燃料丙烷/空气预混火焰特性的微重力实验研究[J].工程热物理学报,2011(7). |
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| 作者姓名： | 袁莉 王双峰 Jarosinski J Gorczakowski A Podfilipski J |
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| 作者单位： | 中国科学院力学研究所国家微重力实验室;罗兹工业大学热能技术与制冷系; |
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| 基金项目： | 中国科学院空间科学预先研究项目资助 |
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| 摘 要： | 地面常重力(1g)条件下,丙烷/空气预混火焰向上传播的富燃极限为9.2%C_3H_8,而向下传播时的富燃极限仅为6.3%C_3H_8,二者之间存在明显差距。利用微重力条件下的实验,对燃料浓度从6.5%到8.6%(微重力实验中测定的可燃极限)范围内的丙烷/空气预混火焰特性进行了研究。实验发现,重力对近极限丙烷/空气火焰的传播有显著影响,影响程度随着当量比的增加而增大。微重力下丙烷/空气的富燃极限为8.6%C_3H_8(φ=2.24),明显高于1g条件下向下传播火焰的可燃极限,略低于向上传播火焰的可燃极限。随着当量比的增大,根据压力变化曲线计算的火焰层流燃烧速度从8.5cm/s逐渐减小到2.7 cm/s,可燃极限处的层流燃烧速度与前人实验数据一致。
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| 关 键 词： | 预混火焰 可燃极限 层流燃烧速度 微重力 |
Experimental Study of Rich Propane/Air Flames in Microgravity |
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| YUAN Li WANG Shuang-Feng Jarosinski J Gorczakowski A Podfilipski J.Experimental Study of Rich Propane/Air Flames in Microgravity[J].Journal of Engineering Thermophysics,2011(7). |
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| Authors: | YUAN Li WANG Shuang-Feng Jarosinski J Gorczakowski A Podfilipski J |
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| Institution: | YUAN Li~1 WANG Shuang-Feng~1 Jarosinski J~2 Gorczakowski A~2 Podfilipski J~2 (1.National Microgravity Laboratory,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China,2.Department of Heat Technology and Refrigeration,Technical University of Lodz,Lodz 90-924,Poland) |
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| Abstract: | Flammability limits for flames propagating in rich propane/air mixtures under normal gravity conditions appeared to be 6.3%C_3H_8 for downward propagation and 9.2%C_3H_8 for upward propagation,and the concentration gap between the two limits was extremely large.In the present work,microgravity experiments were carried out to examine flame properties in propane/air mixtures over the specific range of concentration that extended from 6.5%C_3H_8 to 8.6%C_3H_8(the flammability limit found in the microgravity ex... |
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| Keywords: | premixed flame flammability limit laminar burning velocity microgravity |
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