Two-Phase Flow In Anode Flow Field Of A Small Direct Methanol Fuel Cell In Different Gravities

doi:10.1007/s11431-009-0179-0

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	Two-Phase Flow In Anode Flow Field Of A Small Direct Methanol Fuel Cell In Different Gravities
	Guo H(郭航); Wu F(吴峰); Ye F(叶芳); Zhao JF(赵建福); Wan SX(万士昕); Lu CP; Ma CF; Guo H
发表期刊	Science in China Series E-Technological Sciences
	2009
卷号	52 期号:6 页码:1576-1582
ISSN	1006-9321
摘要	An in-situ visualization of two-phase flow inside anode flow bed of a small liquid fed direct methanol fuel cells in normal and reduced gravity has been conducted in a drop tower. The anode flow bed consists of 11 parallel straight channels. The length, width and depth of single channel, which had rectangular cross section, are 48.0, 2.5 and 2.0 mm, respectively. The rib width was 2.0 mm. The experimental results indicated that when the fuel cell orientation is vertical, two-phase flow pattern in anode channels can evolve from bubbly flow in normal gravity into slug flow in microgravity. The size of bubbles in the reduced gravity is also bigger. In microgravity, the bubbles rising speed in vertical channels is obviously slower than that in normal gravity. When the fuel cell orientation is horizontal, the slug flow in the reduced gravity has almost the same characteristic with that in normal gravity. It implies that the effect of gravity on two-phase flow is small and the bubbles removal is governed by viscous drag. When the gas slugs or gas columns occupy channels, the performance of liquid fed direct methanol fuel cells is failing rapidly. It infers that in long-term microgravity, flow bed and operating condition should be optimized to avoid concentration polarization of fuel cells.
关键词	Direct Methanol Fuel Cells Microgravity Two-phase Flow Visualization Bubble Behavior
学科领域	微重力流体力学
DOI	10.1007/s11431-009-0179-0
收录类别	SCI
语种	英语
WOS记录号	WOS:000266094600013
关键词[WOS]	AEROSPACE APPLICATIONS ; CLOSED ENVIRONMENT ; GAS EVOLUTION ; PERFORMANCE ; PATTERNS ; SYSTEM ; DMFC ; BEHAVIOR ; BUBBLES ; DESIGN
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
引用统计	被引频次：10[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/311007/26700
专题	微重力重点实验室
通讯作者	Guo H
推荐引用方式 GB/T 7714	Guo H,Wu F,Ye F,et al. Two-Phase Flow In Anode Flow Field Of A Small Direct Methanol Fuel Cell In Different Gravities[J]. Science in China Series E-Technological Sciences,2009,52,6,:1576-1582.
APA	Guo H.,Wu F.,Ye F.,Zhao JF.,Wan SX.,...&Guo H.(2009).Two-Phase Flow In Anode Flow Field Of A Small Direct Methanol Fuel Cell In Different Gravities.Science in China Series E-Technological Sciences,52(6),1576-1582.
MLA	Guo H,et al."Two-Phase Flow In Anode Flow Field Of A Small Direct Methanol Fuel Cell In Different Gravities".Science in China Series E-Technological Sciences 52.6(2009):1576-1582.

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