【摘要】 以16L内循环气升式环流反应器为对象,使用Fluent6.3软件对采用不同导流筒直径值的反应器中气液两相流动的过程进行计算流体力学仿真,研究导流筒直径变化对气升式环流反应器中气含率和循环液速的影响。结果表明,气体由反应器底部入口进入反应器后,气液混合物沿导流筒内部上升至反应器顶部,随后沿导流筒外部下降,形成反应器中的循环。增大导流筒直径在一定范围内能够提高反应器中的气含率,但同时也会造成循环液速的下降,并且给出了所涉对象中导流筒直径的最优取值区间。更多还原

【Abstract】 The optimization design problem of 16L internal loop airlift bioreactor is discussed.The gas holdup and the liquid circulation velocity under different inner tube diameters are investigated with the CFD software Fluent 6.3.The results demonstrate that the gas holdup in the riser increases obviously with the increase of the inner tube diameter,while liquid circulation velocity decreases with the increase of the inner tube diameter.Based on the simulated analysis,an optimum region of the inner tube diameter is presented.更多还原