摘要: 散裂靶件作为加速器和次临界堆芯的耦合部件，是ADS系统相关研究最主要的组成部分之一。无窗靶巧妙地利用了液体的自由液面特性，避免了质子束对结构材料直接轰击，是一种很有前景的散裂靶靶件形式。采用水作为实验工质搭建了一套无窗散裂靶水模拟实验台架，该实验系统覆盖了无窗散裂靶水模拟实验所需
的流量及压力条件，采用粒子图像测速仪(PIV) 对自由界面的流场进行可视化观察与分析，得到了自由界面的基本表征参数之间关系和可视化界面的流场信息。结果表明，无窗靶自由液面的位置和形状受到回路整体流量、压力和靶件几何尺寸的影响。

As the coupling component between accelerator and subcritical core, the spallation target is of crucial importance to the operation safety of the whole system. Hence, the spallation target is one of the most important parts in ADS corresponding researches. Due to lifetime limitation of material, the windowless target which has a stable free surface attracts more and more attention. The present paper deals with the experimental investigation on the free surface behavior in an approximately 1:1 size windowless target model using water as test fluid. We can get the flow and pressure conditions of windowless spallation target water simulation experiment from the platform. The free surface and eld visualization were obtained by particle imaging velocimetry. The  results show that the position and  flow pattern of the free surface depend on experimental pressure, flow velocity and geometry of the target.