IMECH-IR  > 国家微重力实验室
Alternative TitleExperimental Study of Rich Propane/Air Flames in Microgravity
袁莉; 王双峰; Jarosinski J; Gorczakowski A; Podfilipski J
Source Publication工程热物理学报
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 AbstractFlammability 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
Indexed ByEI ; CSCD
Funding Organization中国科学院空间科学预先研究项目资助
Citation statistics
Document Type期刊论文
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.
Files in This Item: Download All
File Name/Size DocType Version Access License
C2011J049.pdf(694KB) 开放获取--View Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[袁莉]'s Articles
[王双峰]'s Articles
[Jarosinski J]'s Articles
Baidu academic
Similar articles in Baidu academic
[袁莉]'s Articles
[王双峰]'s Articles
[Jarosinski J]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[袁莉]'s Articles
[王双峰]'s Articles
[Jarosinski J]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: C2011J049.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.