IMECH-IR  > 国家微重力实验室
Ignition of single coal particle in a hot furnace under normal- and micro-gravity condition
Zhu MM; Zhang H; Tang GT; Liu Q; Lu JF; Yue GX; Wang SF(王双峰); Wan SX(万士昕)
Source PublicationProceedings of the Combustion Institute
2009
Volume32Issue:1Pages:2029–2035
ISSN1540-7489
AbstractAn experimental study on ignition and combustion of single particles was conducted at normal gravity (1-g) and microgravity (l-g) for three high volatile coals with initial diameter of 1.5 and 2.0 mm, respectively. The non-intrusive twin-color pyrometry method was used to retrieve the surface temperature of the coal particle through processing the images taken by a color CCD camera. At the same time, a mathematical model considering thermal conduction inside the coal particle was developed to simulate the ignition process. Both experiments and modeling found that ignition occurred homogeneously at the beginning and then heterogeneously for the testing coal particles burning at l-g. Experimental results confirmed that ignition temperature decreased with increasing volatile content and increasing particle size. However, contradicted to previous studies, this study found that for a given coal with certain particle size, ignition temperature was about 50–80 K lower at l-g than that at 1-g. The model predictions agreed well with the l-g experimental data on ignition temperature. The criterion that the temperature gradient in the space away from the particle surface equaled to zero was validated to determine the commence of homogeneous ignition. Thermal conduction inside the particle could have a noticeable effect for determining the ignition temperature. With the consideration of thermal conduction, the critical size for the phase transient from homogeneous to heterogeneous is about 700 lm at ambient temperature 1500 K and oxygen concentration 0.23. 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
KeywordIgnition Single Coal Particle Microgravity Ignition Temperature Buoyancy Effect
DOI10.1016/j.proci.2008.06.046
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000264756900047
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical
DepartmentNML微重力两相流与燃烧
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/43310
Collection国家微重力实验室
Corresponding AuthorZhang H
Recommended Citation
GB/T 7714
Zhu MM,Zhang H,Tang GT,et al. Ignition of single coal particle in a hot furnace under normal- and micro-gravity condition[J]. Proceedings of the Combustion Institute,2009,32(1):2029–2035.
APA Zhu MM.,Zhang H.,Tang GT.,Liu Q.,Lu JF.,...&Wan SX.(2009).Ignition of single coal particle in a hot furnace under normal- and micro-gravity condition.Proceedings of the Combustion Institute,32(1),2029–2035.
MLA Zhu MM,et al."Ignition of single coal particle in a hot furnace under normal- and micro-gravity condition".Proceedings of the Combustion Institute 32.1(2009):2029–2035.
Files in This Item: Download All
File Name/Size DocType Version Access License
InProceedings2009.pd(430KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhu MM]'s Articles
[Zhang H]'s Articles
[Tang GT]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu MM]'s Articles
[Zhang H]'s Articles
[Tang GT]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu MM]'s Articles
[Zhang H]'s Articles
[Tang GT]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: InProceedings2009.pdf
Format: Adobe PDF
 

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