平行板间边界层流体速度计算及差异分析

摘要

利用粘性流体相关理论并结合施利希廷平行管道边界层研究成果，推导出了水平放置的平板间边界层流体速度计算公式。在一定假设条件下利用斯托克斯定律对该公式进行了验算，并对差异产生原因进行了定性分析。结果表明，考虑边界层条件时流体速度分布规律与理想流体明显不同，考虑边界层条件时油滴的实际运移距离比理想状态计算出的运移距离长5％～7％，对除油效果有一定影响。因此在斜板除油器设计中应充分考虑这种情况的影响。%A fluid velocity formula in boundary layerbetween two horizontal parallel plates is derived basedon relative theory of viscous fluid mechanics and re-search of Schiliting H.about flow in a inlet length of astraight channel.On some given assumptions,wechecked computations with the motion law of Stokes ofoil droplets and analyzed the reason of the differences.The Calculations show that the flow is different be-tween the cases of boundary layer and ideal laminar.The former horizontal movement distance of oil drop-lets is 5%~7%longer than those in ideal laminar con-ditions.It will decrease the oil removal efficiency andshould be taken into consideration in the design of in-clined plate separator.