中文摘要：

无窗散裂靶件是加速器驱动的次临界系统的重要组成部分。为了使靶件维持稳定的自由界面并具有良好的热移出功能，本文提出一种上旋式无窗靶件设计，以水为工质，采用ANSYS Fluent软件对该靶件设计进行数值模拟。结果表明，该结构散裂靶件能较好地维持稳定自由界面，不会出现漩涡滞止区，并得到不同入口流速对自由界面形状、流场特征及压降的影响。

英文摘要：

The windowless spallation target is one of most important components of the accelerator driven sub‐critical system .An upward rotation windowless spallation target which chooses water as the working medium was proposed .The target can keep the interface steady and move out the heat in time .The numerical simulation was proceeded by ANSYS Fluent .Through the study it is proved that a steady surface can be kept with this kind of target .T here is no w hirlpool exists and the velocity below interface as same as the pressure drop under various inlet velocities can be found out .