Experimental Study on the Ignition Process of Single Coal Particles at Microgravity

doi:10.1007/s12217-008-9101-9

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	Experimental Study on the Ignition Process of Single Coal Particles at Microgravity
	Tang GT; Zhang H; Zhu MM; Yang HR; Yue GX; Wang SF(王双峰); Wan SX(万士昕)
发表期刊	Microgravity Science and Technology
	2010
卷号	22 期号:1 页码:27-35
ISSN	0938-0108
摘要	In this paper, the first Chinese microgravity (μ-g) experimental study on coal combustion was introduced. An experimental system used to study the ignition process of single coal particles was built up, complying with the requirements of the 3.5 s drop tower in the National Microgravity Laboratory of China (NMLC). High volatile bituminous and lignite coal particles with diameter of 1.5 and 2.0 mm were tested. The ignition and combustion process was recorded by a color CCD and the particle surface temperature before and at the ignition was determined by the RGB colorimetric method. Comparative experiments were conducted at normal gravity (1-g). The experiments revealed that at different gravity levels, the ignition of all tested coal particles commenced in homogeneous phase, while the shape, structure, brightness and development of the flames, as well as the volatile matter release during the ignition process are different. At μ-g, the part of volatile was released as a jet, while such a phenomenon was barely observed at 1-g. Also, after ignition, flames were more spherical, thicker, laminated and dimmer at μ-g. It was confirmed that ignition temperature decreased as the particle size or volatile content increased. However, contradicted to existing experimental results, provided other experimental conditions except gravity level were the same, ignition temperature of coal particles was about 50–80 K lower at μ-g than that at 1-g.
DOI	10.1007/s12217-008-9101-9
收录类别	SCI
语种	英语
WOS记录号	WOS:000273789100004
关键词[WOS]	DEPENDENCE ; MECHANISM ; TEMPERATURE
WOS研究方向	Engineering ; Thermodynamics ; Mechanics
WOS类目	Engineering, Aerospace ; Thermodynamics ; Mechanics
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/34211
专题	微重力重点实验室
通讯作者	Zhang H
推荐引用方式 GB/T 7714	Tang GT,Zhang H,Zhu MM,et al. Experimental Study on the Ignition Process of Single Coal Particles at Microgravity[J]. Microgravity Science and Technology,2010,22,1,:27-35.
APA	Tang GT.,Zhang H.,Zhu MM.,Yang HR.,Yue GX.,...&万士昕.(2010).Experimental Study on the Ignition Process of Single Coal Particles at Microgravity.Microgravity Science and Technology,22(1),27-35.
MLA	Tang GT,et al."Experimental Study on the Ignition Process of Single Coal Particles at Microgravity".Microgravity Science and Technology 22.1(2010):27-35.

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