【摘要】 为了研究微型直接甲醇燃料电池流道的横截面积对气泡流动的影响,采用FLUENT中的VOF方法对蛇形流道进行研究,假设深度变化范围在0.2～0.6 mm之间,跨度为0.2 mm;台肩宽度变化范围在0.2～0.5 mm之间,跨度为0.05 mm.在模拟的过程中,假设流动方式为层流、均为不可压缩流体,忽略重力.研究结果表明:随着流道深度的减小,蛇形流道的进出口压力降增大,因此在设计工艺允许的条件下,可以尽量减小流道深度;台肩宽度与流道宽度相近时即台肩宽度为流道宽度的0.75～1倍时,气泡段排出流道时间较短,且进出口压力降较大.更多还原

【Abstract】 In order to study the influence of cross-sectional area of micro Direct methanol fuel cell on bubble flow,the VOF method in FLUENT was used to study the serpentine channel.The range of depth was 0.2 mm,0.4 mm,0.6 mm The width range is 0.2 mm,0.25 mm,0.3 mm,0.35 mm,0.4 mm,0.45 mm,0.5 mm.Assume that the flow pattern is Laminar,all Incompressible flow,and ignore gravity.The results show that the pressure drop at the inlet and outlet of the snake-shaped runner increases with the decrease of the runner depth When the width of the shoulder is 0.75 ～ 1 times of the width of the runner,the discharge time of the bubble section is shorter and the pressure drop of the inlet and outlet is larger.更多还原