物理学报Issue(10)：1-5,5.DOI:10.7498/aps.64.102901
氘氚聚变中子发生器旋转氚靶传热特性研究∗
Heat transfer analysis of rotating tritium target of deuterium-tritium fusion neutron generator
摘要
Abstract
Fusion reactor is considered as one of the solutions for the sustaining development of nuclear energy. International Thermonuclear Experimental Reactor (ITER) is the biggest fusion reactor research plan in the world. High-intensity D-T fusion neutron generator can generate 14 MeV neutrons, and it matches the neutrons generated in ITER and be competently used for imitating the neutron environment in nuclear fusion reactor, which is important for the relevant experimental researches of blanket materials of fusion reactors. It can also be used for validating the correctness and reliability of the simulations and analyses in fusion basic studies, and can guide the subsequent material improvement and innovation of calculation methodology. A rotating tritium target system for D-T fusion neutron generator with a neutron yield of 1012 n·s−1, i.e., a high intensity D-T fusion neutron generator, is proposed in this paper and the design, main parameters, technical difficulties and heat transfer enhancement method are introduced. The key and innovative technology of this rotating target system is the integration of the sprayed water cooling, mechanical seal and magnetic fluid seal technologies, which focuses on the heat transfer of the high heat power density in the target system. The most important technical index is that the maximum temperature on the target should not be above 200 ◦C as the tritium ions run away heavily from the tritium target when the target temperature is bigger than 200 ◦C. To investigate the heat transfer characteristics of this rotating target system, the effects of water layer thickness, water flow rate and rotating speed on the heat transfer of this rotating target system are analyzed by computational fluid dynamics method. And the heat transfer processes of the target system under different heat power densities are also simulated and studied. The analysis results show that big water layer thickness, big water flow rate and high rotating speed are good for the heat transfer enhancement of the rotating target system, but the effects of the changes of the water layer thickness and water flow rate on the heat transfer process are both very small. Due to the design index, the heat power density on the target should be under a limit value, which is about 12 kW·cm−2 in the calculation results of this paper.关键词
氘氚聚变/中子发生器/旋转靶/传热特性Key words
deuterium-tritium fusion/neutron generator/rotating target/heat transfer characteristics引用本文复制引用
王刚,于前锋,王文,宋钢,吴宜灿..氘氚聚变中子发生器旋转氚靶传热特性研究∗[J].物理学报,2015,(10):1-5,5.基金项目
中国科学院科研装备研制项目(批准号：Y2010009)资助的课题.* Project supported by the Scientific Research Equipment Development Project of Chinese Academy of Sciences (Grant No. Y2010009) （批准号：Y2010009）
