冷冻靶封装套中辅助热流密度的优化  

Optimization of Auxiliary Heat Flux in Thermo-mechanical Package of Cryogenic Target

作　　者：殷阁媛 厉彦忠[1] 郑江[1] 

机构地区：[1]西安交通大学能源与动力工程学院动力工程多相流国家重点实验室,陕西西安710049

出　　处：《原子能科学技术》2016年第4期627-634,共8页Atomic Energy Science and Technology

基　　金：国家科技重大专项资助

摘　　要：为研究达到控温要求的冷冻靶封装套辅助加热量,建立了带有屏蔽罩和暴风窗的冷冻靶的二维轴对称模型。考虑封装套外屏蔽罩辐射强度和封装套内填充气体压力对冷冻靶温度场的影响,利用FLUENT软件对冷冻靶温度场进行了数值模拟计算。结果表明:合理选择上、下辅助加热带的热流密度及其差值,可使靶丸外表面最大温差降至0.1mK以下;辐射强度越强,气体压力越大,靶丸表面最大温差越大,为实现靶丸外表面温度均匀性要求所施加的上、下辅助热流密度的差值就应越大。To investigate the auxiliary heat flux for temperature control in the thermomechanical package of cryogenic targets,a 2-D axial symmetric computational fluid dynamics model for thermo-mechanical package with a radiation shield and storm window was established.By considering the effects of radiation heat transfer outside the thermo-mechanical package and the gas pressure filled-in the thermo-mechanical package,the temperature field of the cryogenic target was solved with FLUENT software.The results show that rational selection of the heat fluxes in both the upper and lower auxiliary heating zones and their differences enables the maximum temperature difference of the target surface to be less than 0.1mK.As the radiation intensity and the gas pressure increase,the maximum temperature difference of the target outer-surface increases,as well as the optimized difference of the upper and lower auxiliary heat fluxes increases to fulfil the requirement of temperature uniformity on the target outersurface.

关 键 词：非对称热流 辐射强度 气体压力 自然对流 

分 类 号：O411.3[理学—理论物理] O351.2[理学—物理]