Abstract: The flow profile in an open raceway photo-bioreactor was studied by employing computational fluid dynamics（CFD）. The effects of the inducing baffle structure，air inlets spacing along length direction and width direction were investigated. The calculated results showed that an open raceway photo-bioreactor has maximum velocity，minimum dead zone ratio and minimum power input when the inducing baffles angles are 180°，and extending length ?L/W is 0.5. The average velocity magnitude along the light direction is maximum when the spacing along width direction ?Y/W1 is 1/4，and the spacing along length direction ?X/L1 is 0.025. Light intensity，light and dark frequency of algal cells are derived from particle trajectories with and without air by employing particle tracking model （PTM）.

Key words: algae energy, open raceway pond, computational fluid dynamics（CFD）, particle tracking model （PTM）

摘要： 采用CFD技术对敞开式跑道池光生物反应器流场进行了研究，考察了导流板结构、跑道池底部进气孔长度和宽度方向间距对流场的影响规律。结果表明，当内外导流板均为180°、导流板延伸长度?L/W为0.5时，跑道池平均速率最大，死区比例最小，功率输入最少；当宽度方向间距?Y/W1为1/4、长度方向间距?X/L1为0.025时，平均光照方向速率最大。采用粒子追踪模型，分别计算不通气与通气情况下粒子的运动轨迹，分析得到藻细胞的光照强度、光暗交替频率。

关键词: 微藻能源, 敞开式跑道池, 计算流体力学, 粒子追踪模型