颗粒流散裂靶缩比模型流态实验研究

Flow Experimental Study in Scaling Model of Granular Spallation Target

摘要: 散裂靶是加速器驱动次临界系统（ADS）的重要组成部分，颗粒流散裂靶是最新提出并经理论计算的一种高功率散裂靶，研究其颗粒流的流动特性对散裂靶的设计优化有重要意义。本文以螺旋提升机为颗粒流驱动装置，搭建一套颗粒流循环回路系统，研究了倾斜段管道的倾斜角度对三维颗粒流从堵塞流向密集流转变的影响。研究发现，随着螺旋提升机提升频率的增加（即颗粒流量的增加），在散裂靶靶区存在颗粒稀疏流-密集流转变，在靶区附近能形成稳定的密集流。

Abstract: The granular spallation target has been raised through theoretical calculation, which is the crucial part of accelerator driven sub-critical system (ADS). It is important to study the flow inside the spallation target before optimizing design. The experiments were carried out in a three-dimensional channel with a screw conveyor as granular drive. The jam-to-dense transition of granular flow was studied with different inclination angles. The variation of flow rate with elevate frequency was further studied. The flow pattern is changed from dilute flow to dense flow with increase of elevate frequency. The stable dense flow exists in main target section.