| 富燃料丙烷/空气预混火焰特性的微重力实验研究 | |
| Alternative Title | Experimental Study of Rich Propane/Air Flames in Microgravity |
袁莉 ; 王双峰; Jarosinski J; Gorczakowski A; Podfilipski J
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| Source Publication | 工程热物理学报
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| 2011-07-15 | |
| Volume | 32Issue:7Pages:1241-1244 |
| ISSN | 0253-231X |
| Abstract | 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%C3H8,而向下传播时的富燃极限仅为6.3%C3H8,二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%C3H8（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。 |
| Other Abstract | Flammability limits for flames propagating in rich propane/air mixtures under normal gravity conditions appeared to be 6.3%C3H8 for downward propagation and 9.2%C3H8 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%C3H8 to 8.6%C3H8（the flammability limit found in the microgravity experiments）.It was found that buoyancy played a significant role in flames propagating near flammability,and the influence increased with equivalence ratio.The rich limit was determined to be 8.6%C3H8 under microgravity,which was far behind the limit for downward-propagating flame and close to the limit for upward-propagating flame at 1g.The laminar burning velocities,calculated on base of the pressure curves,gradually decreased from 8.5 cm/s to 2.7 cm/s with the increase of equivalence ratio,and burning velocity at the flammability limit was consistent with previous experimental data. |
| Keyword | 预混火焰 可燃极限 层流燃烧速度 微重力 |
| Subject Area | 力学 |
| URL | 查看原文 |
| Indexed By | EI ; CSCD |
| Language | 中文 |
| Funding Organization | 中国科学院空间科学预先研究项目资助 |
| CSCD ID | CSCD:4235758 |
| Department | NML微重力两相流与燃烧 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/45124 |
| Collection | 微重力重点实验室 |
| Corresponding Author | 袁莉 |
| Recommended Citation GB/T 7714 | 袁莉,王双峰,Jarosinski J,等. 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,2011,32,7,:1241-1244. |
| APA | 袁莉,王双峰,Jarosinski J,Gorczakowski A,&Podfilipski J.(2011).富燃料丙烷/空气预混火焰特性的微重力实验研究.工程热物理学报,32(7),1241-1244. |
| MLA | 袁莉,et al."富燃料丙烷/空气预混火焰特性的微重力实验研究".工程热物理学报 32.7(2011):1241-1244. |
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