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

	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
刊名	Science in China Series E-Technological Sciences
	2009
通讯作者邮箱	hangguo@sohu.com
卷号	52 期号:6 页码:1576-1582
关键词	Direct Methanol Fuel Cells,Microgravity, Two-phase flow, Visualization, Bubble behavior
ISSN号	1006-9321
通讯作者	Guo H
中文摘要	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.
学科主题	微重力流体力学
类目[WOS]	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
研究领域[WOS]	Engineering ; Materials Science
关键词[WOS]	AEROSPACE APPLICATIONS ; CLOSED ENVIRONMENT ; GAS EVOLUTION ; PERFORMANCE ; PATTERNS ; SYSTEM ; DMFC ; BEHAVIOR ; BUBBLES ; DESIGN
收录类别	SCI
语种	英语
WOS记录号	WOS:000266094600013
公开日期	2009-08-03
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/26700]
专题	力学研究所_国家微重力实验室
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.