Two-Phase Flow In Fuel Cells In Short-Term Microgravity Condition

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	Two-Phase Flow In Fuel Cells In Short-Term Microgravity Condition
	Guo H; Zhao JF(赵建福); Ye F; Wu F; Lv CP; Ma CF
刊名	Microgravity Science And Technology
	2008
通讯作者邮箱	hangguo@sohu.com
页码	265-269
关键词	Fuel Cells Two-Phase Flow Microgravity Aerospace Applications Closed Environment Gas Evolution Performance System Visualization Channels Behavior Cathode Field
ISSN号	0938-0108
通讯作者	Guo, H (reprint author), Beijing Univ Technol, Coll Environm & Energy Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, 100 Ping Yuan, Beijing 100124, Peoples R China.
中文摘要	A visual observation of liquid-gas two-phase flow in anode channels of a direct methanol proton exchange membrane fuel cells in microgravity has been carried out in a drop tower. The anode flow bed consisted of 2 manifolds and 11 parallel straight channels. The length, width and depth of single channel with rectangular cross section was 48.0 mm, 2.5 mm and 2.0 mm, respectively. The experimental results indicated that the size of bubbles in microgravity condition is bigger than that in normal gravity. The longer the time, the bigger the bubbles. The velocity of bubbles rising is slower than that in normal gravity because buoyancy lift is very weak in microgravity. The flow pattern in anode channels could change from bubbly flow in normal gravity to slug flow in microgravity. The gas slugs blocked supply of reactants from channels to anode catalyst layer through gas diffusion layer. When the weakened mass transfer causes concentration polarization, the output performance of fuel cells declines.
类目[WOS]	Engineering, Aerospace ; Thermodynamics ; Mechanics
研究领域[WOS]	Engineering ; Thermodynamics ; Mechanics
关键词[WOS]	AEROSPACE APPLICATIONS ; CLOSED ENVIRONMENT ; GAS EVOLUTION ; PERFORMANCE ; SYSTEM ; VISUALIZATION ; CHANNELS ; BEHAVIOR ; CATHODE ; FIELD
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000260252200022
公开日期	2009-08-03 ; 2009-09-14
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/25556]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Guo H,Zhao JF,Ye F,et al. Two-Phase Flow In Fuel Cells In Short-Term Microgravity Condition[J]. Microgravity Science And Technology,2008:265-269.
APA	Guo H,赵建福,Ye F,Wu F,Lv CP,&Ma CF.(2008).Two-Phase Flow In Fuel Cells In Short-Term Microgravity Condition.Microgravity Science And Technology,265-269.
MLA	Guo H,et al."Two-Phase Flow In Fuel Cells In Short-Term Microgravity Condition".Microgravity Science And Technology (2008):265-269.