密集颗粒流靶流动性的研究现状及展望

高功率散裂靶作为强中子源，在核嬗变、核合成及材料研究等方面具有重要的应用价值。密集颗粒流靶兼具固体靶和液态靶的优点，被认为是未来高功率靶领域最具前景的候选方案之一。本文首先回顾了密集颗粒流靶概念的提出和发展；然后综述了靶设计中关于流动性的几个关键问题，包括束靶耦合算法的建立和优化、颗粒材料和流动特性预测算法的探索，以及整体流量和局部流场的优化；最后展望了密集颗粒流在高功率靶研究中的未来方向。

Current status and prospects of research on the flowability of dense granular-flow target

As an intense neutron sources, the high power spallation targets have important application value in the nuclear transmutation, nuclear synthesis, material research and so on. Dense granular-flow targets have the advantages of both solid and liquid targets, and make them become one of the most candidate promising solutions for the future high power targets. Here, the proposal and development of the concept of dense particle flow targets were reviewed. Then, several key issues related to flowability in the design of the targets were reviewed, including the establishment and optimization of coupling algorithms for the beam target, the exploration of the prediction algorithms for the particle material and flow characteristics, and the optimization of the overall flow rate and local flow field. Finally, the future direction of the dense granular-flow in high power target research was prospected.