Abstract
Liquid lithium (Li) jet is planned as a beam target in fusion neutron sources (FNSs), such as IFMIF in Japan and EU, A-FNS in Japan and IFMIF-DONES in EU. We have been studying the high-speed Li jet experimentally and numerically, and Li Loop of Osaka University (LLOU) and EVEDA Li Test Loop (ELTL) have been used. For the safety and the efficiency of such actual FNSs, it is significant to understand the detailed flow structure inside the Li jet for removing heat load due to deuteron beam. At this time, ELTL was already dismantled and thus experiments using LLOU become more important for the development of A-FNS. However, LLOU has the different configuration from A-FNS. Therefore, it is important to clarify the difference of the hydrodynamic characteristics of the Li jet between LLOU and A-FNS. In this study, two types of simulation were conducted; one was the Li flow simulation inside the nozzle of ELTL and another one was the Li jet simulation of ELTL. The former results were compared with that of LLOU and the later results were verified by comparing it to the experimental results in ELTL. Then, heat transfer inside the Li jet in beam-on-target was predicted.
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