中文摘要：

针对双级活塞推料离心机物料分配系统中的叶片式离心加速盘在使用过程中存在物料加速效果差、晶粒易破碎等问题，借鉴泵等旋转机械中的叶片设计理论，对离心加速盘叶片曲线进行了优化设计研究．采用CFD数值模拟方法，对叶片曲线为等变角螺旋线和可控包角曲线两种离心加速盘的结构分别进行了计算，得到了物料在离心加速盘中运动的流场图．所选取的中径处径向速度和出口处切向速度能定性地反映物料在离心加速盘中的回流情况和加速效果．模拟计算结果表明，出口安放角为15°、包角为90°的可控包角曲线对重碱二次脱水最有利．将工业试验数据与模拟结果进行对比表明，试验与模拟结果相一致．本研究结果为双级活塞推料离心机在重碱生产中的应用提供了设计依据和指导．

英文摘要：

The vane centrifugal accelerator disk is a structure in the two-stage piston pusher centrifuge for material distribution. However, it is found that the material cannot be well accelerated and the particle is easily broken during the production process. Therefore, based on the blade design theory of rotating machinery, the optimal design was discussed for the centrifugal accelerator. The CFD numerical calculations were performed in two models with two different blades, variable angle helix and controllable angle curve. The flow condition in the accelerator could be obtained. And the radial velocity at the intermediate diameter and the tangential velocity were chosen to reflect the backflow in the accelerator and the haste effect, respectively. The simulation results show that the curve with the outlet angle 15° and the wrap angle 90° is the most beneficial for the dehydration of heavy soda. These results are consistent with the experimental data, which can provide the basis and guidance for the centrifuge in the production of heavy soda.