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超导托卡马克偏滤器稳态热流密度在10 MW/m~2以上,是核聚变反应堆中的关键部件。目前钨铜水冷结构在超导托卡马克偏滤器中的应用最为广泛。这个结构中,无氧铜管与铬锆铜铜管交界面存在温度最高点。如果长期处在高温状态,该处结构将首先被烧坏,从而导致部件失效,影响反应堆的稳定性和安全性。因此,该点成为关键,研究它的温度变化规律,对超导托卡马克核聚变反应堆设计具有重要意义。本文利用F1uent的VOF多相流模型对偏滤器内部的水冷结构进行了模拟,选取圆管和方管水冷单元,研究不同管道尺寸和不同热流密度条件下关键点的温度变化和流道的阻力特性,获得了较优的冷却管结构,为超导托卡马克偏滤器的设计提供了指导。
The superconducting tokamak divertor steady-state heat flux density of 10 MW / m ~ 2 above, is a key component in nuclear fusion reactors. At present, tungsten-copper water-cooled structure is the most widely used in superconducting tokamak divertor. In this structure, the highest temperature exists at the interface between the oxygen-free copper pipe and the chrome-zirconium copper-copper pipe. If it is exposed to high temperature over a long period of time, the structure will first be burned out, leading to component failure and affecting the stability and safety of the reactor. Therefore, this point has become the key to study its temperature variation, which is of great significance for the design of superconducting Tokamak nuclear fusion reactors. In this paper, F1uent’s VOF multi-phase flow model was used to simulate the water-cooled structure inside the divertor. The circular tube and the square tube water-cooling unit were selected to study the temperature change and the resistance characteristics of the flow channel at different pipe sizes and different heat flux density The optimal cooling tube structure was obtained, which provided guidance for the design of superconducting tokamak divertor.