基于扩散界面法的ADS无窗散裂靶自由界面数值研究  

Numerical Study of Free Interface of ADS Windowless Spallation Target Based on Diffusion Interface Method

作　　者：林显斌 蔡杰进[1] 王烨[1] LIN Xianbin;CAI Jiejin;WANG Ye(School of Electric Power,South China University of Technology,Guangzhou of Guangdong Prov.510640,China)

机构地区：[1]华南理工大学电力学院

出　　处：《核科学与工程》2019年第5期687-694,共8页Nuclear Science and Engineering

基　　金：国家自然科学基金资助项目(11675057)

摘　　要：采用水作为模拟工质,用扩散界面法和有限元法以及k-ε湍流模型对无窗靶件的自由界面非稳态特性进行数值模拟。结果和实验吻合较好,表明扩散界面法能准确地进行模拟,并且结果表明流场中存在一个回流区以及中心线沿程压力存在一个谷值和峰值。通过计算不同出口背压下的自由界面的形状和高度,获得出口压力对界面稳定性的影响,同时计算不同出口背压对回流区长度的影响以得到增大无窗靶的热移出能力的规律,结果表明:出口背压在900Pa以上,自由界面较稳定,不会产生明显的气泡,出口背压越大,自由界面越稳定,高度越高;同时,出口背压越大,回流区的高度越低,热移出能力越强。Water is used as the simulated working fluid,and the non-steady-state characteristics of the free interface of the windowless target are numerically simulated by the diffusion interface method and the finite element method and the k-εturbulence model.The results agree well with the experimental results,indicating that the diffusion interface method can be accurately used,and the results show that there is a recirculation zone in the flow field and a valley and peak value along the centerline pressure.By calculating the shape and height of the free interface under different outlet pressures,the influence of outlet pressure on the interface stability is obtained.At the same time,the influence of different outlet pressure on the length of the recirculation zone is calculated to obtain the law of easing the heat removal ability of the windowless target.The results show that the outlet pressure is above 900Pa,the free interface is stable,and no obvious bubbles are generated.The outlet pressure is larger,the free interface is more stable,and the free interface height is larger.At the same time,the outlet pressure is larger,and the lower the height of the recirculation zone,the stronger the heat removal capability.

关 键 词：无窗散裂靶 扩散界面法 自由界面 回流区 

分 类 号：TL334[核科学技术—核技术及应用]