首页> 中文期刊> 《水利与建筑工程学报》 >固体单颗粒在双筒同心液流中悬浮运动的试验研究

固体单颗粒在双筒同心液流中悬浮运动的试验研究

         

摘要

利用泰勒涡胞试验,采用单颗粒运动学及动力学模型,从差异旋转惯性力角度分析固体单颗粒在旋转液流两种情况下的运动特性和受力规律。试验结果表明:在内筒持续旋转、外筒始终静止水流情况下,固体单颗粒所受到的离心力绝对值大于其所受差异旋转惯性力绝对值,且离心力方向与差异旋转惯性力方向一致,固体单颗粒做离心运动,其所受的离心力数值与差异旋转惯性力数值在1个数量级左右;在内筒先旋转后静止、外筒静止的试验条件下,固体单颗粒所受到的离心力绝对值小于其所受差异旋转惯性力绝对值,且离心力方向与差异旋转惯性力方向相反,固体单颗粒做向心运动,其所受的离心力数值与差异旋转惯性力数值在同一数量级。%By using Taylor’s vortex-cell experiment and the single-particle model with kinematics and dynamics ,the mo-tion characteristics and laws of the solid single-particles under two conditions of rotary and fluid flow were analyzed from the point of different rotational inertia-force .The experimental results indicate that under the conditions of inner cylinder rotating and outer cylinder being static ,the absolute value of the solid single particles from centrifugal force is greater than that from different rotational inertia-force ,and the direction of the centrifugal force is same with that of the different rotational inertial-force ,simultaneously ,the solid single partictes do centrifugal motion ,and their centrifugal force value is about one order of magnitude with their different rotational inertia-force value ;On the contrary ,under the conditions of the inner cylinder totating firstly and then being static and the outer cylinder being static ,the obsolute value of the solid single particles from the centrifugal force is smaller than that from the different rotational inertia-force ,and the direction of the contrifugal force is contrary with that of the different rotational inertia-force ,simultaneously ,the solid single parti-cles do centripetal motion ,and their centrifugal force value is in the same order of magnitude with their different rotational inertia-force value .

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