【摘要】 本文用任意波形的液相浓度信号输入,时间域曲线拟合法,研究环流装置的液相流型和下降管中的液相局部返混系数。实验结果表明,上升管用活塞流模型、下降管用部份返混流模型可以较好地描述该系统的液相流动。几种方法的比较结果证明,时间域曲线拟合法比矩量法和修正矩量法优越;下降管液相局部返混系数随液速增加而增加,砂粒粒径对液相返混系数影响较大。更多还原

【Abstract】 Liquid-phase flow pattern of loop device and liquid-phase local baclcmixing coefficient in the down-flow pipe have been investigated by signal response method with random wave shape input and curve fitting in the time domain. It is shown that liquid-phase flow in this System can be better described by using plug-flow model in the up-flow pipe and local backmixing flow model in the down-flow pipe.更多还原