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首页> 外文期刊>Chemical Engineering Science >Numerical simulation on optimizing flow field and flashing-light effect in jet-aerated tangential swirling-flow plate photobioreactor to improve microalgal growth
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Numerical simulation on optimizing flow field and flashing-light effect in jet-aerated tangential swirling-flow plate photobioreactor to improve microalgal growth

机译：射流切向旋流板光生物反应器优化流场和闪光效应的数值模拟，提高微藻生长

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摘要

To reduce the dead zone in photobioreactors, strengthen the flashing-light effect and promote microalgal growth, computational fluid dynamics (CFD) simulation was employed to optimize the turbulent kinetic energy (TKE) and light/dark circle frequency in jet-aerated tangential swirling-flow plate (JTSP) photobioreactor. The tangential jets created a large clockwise vertical vortex and several secondary vortices in the JTSP photobioreactor, which significantly reduced the proportion of the dead zone and increased the light/dark circle frequency. Compared with the traditional airlift plate photobioreactor, the dead zone of the JTSP photobioreactor was reduced by 56.9%, whereas TKE increased by 35.5% to 18.2 cm(2)/s(2). Meanwhile, the light/dark circle frequency increased by 11.4-fold to 0.13 Hz, and the light time ratio increased by 17.1-fold to 33.4%. This led to a 46.5% increase in the biomass dry weight and 54.8% increase in the CO2 fixation rate in the JTSP photobioreactor. (C) 2019 Elsevier Ltd. All rights reserved.
机译：为了减少光生物反应器中的死区，加强闪光效果并促进微藻生长，采用计算流体动力学（CFD）模拟来优化喷射曝气切向旋流中的湍流动能（TKE）和光/暗圆圆频率 - 流动板（JTSP）光生物反应器。切线射流在JTSP光生物反应器中产生了一个大的顺时针垂直涡流和几个辅助涡流，这显着降低了死区的比例并增加了光/暗圆频率。与传统的空运板光生物反应器相比，JTSP光生物反应器的死区降低了56.9％，而TKE增加35.5％至18.2cm（2）/ s（2）。同时，光/暗圆频率增加11.4倍至0.13Hz，光时间比增加17.1倍至33.4％。这导致生物质干重的46.5％增加，JTSP光生物反应器中的CO 2固定速率增加了54.8％。 （c）2019年elestvier有限公司保留所有权利。

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