液态金属镓回路搭建及无窗靶实验研究

Construction of Liquid Metal Gallium Loop and Experimental Study of Windowless Target

液态金属回路是开展液态金属散裂靶关键技术与实验验证的必备实验平台。镓具有较低的熔点、非常高的沸点,且无毒性,可在液态金属回路实验中作为模拟介质使用。本文介绍了一套小型液态金属镓回路的设计思路、结构组件、基本功能及使用流程,给出了液态镓在变频离心泵驱动下强制对流的流量、压力、压差及无窗靶自由液面位置和形态的实验测量结果,并分析了压力、压差及自由液面位置随流量的变化关系。结果表明,无窗靶自由液面位置主要由流体压力和流速决定。

T he liquid metal loop is an essential experimental facility for carrying out key technological and experimental verifications of liquid metal spallation target . Gallium has lower melting point and very high boiling point ,and is non-toxicity ,so it could be used as a simulation medium in experiments of liquid metal loop .The design idea ,struc-tural component ,basic function and operation process of a small-scale liquid metal galli-um loop were described .The liquid gallium is driven by a variable frequency centrifugal pump to generate forced convection , simultaneously , the flow , pressure , differential pressure in the loop ,and the position and shape of the free surface in the windowless target were measured .Finally ,the changes of the pressure ,differential pressure ,and free surface position with the flow were analyzed .The results show that the free surface position depends on pressure and flow velocity .