摘要
液氮冷却硅晶体单色器是一个流固耦合传热系统,涉及固体部件之间的传热和计算流体力学(CFD)问题。硅晶体和无氧铜之间发生热传导,无氧铜和液氮之间进行对流换热。确定上述流固耦合传热系统的内部边界条件成为该系统研究的难点。因此,采用热流固三场耦合分析方法将液氮-无氧铜-硅晶体作为一个整体进行研究,计算时只定义系统的外部边界条件。该冷却结构设计考虑了硅晶体和无氧铜之间的接触热阻和液氮在冷却通道内的流动,因而模拟结果与实际状况更加接近,且此液氮间接冷却硅晶体单色器结构能够承受870W的热负荷将用于北京先进光源。
The liquid nitrogen（ LN2 ） -cooled silicon crystal monochromator is a fluid -solid coupling system which involves solid heat transfer and computational fluid dynamics（CFD）. Heat conduction occurs between silicon crystal and oxygen free cop- per（ OFC）, at the same time convection between OFC and LN2. It is difficult to confirm the internal boundary condition for the fluid--solid coupling heat transfer system. Therefore, LN20FC and silicon crystal as a whole were studied by coupling analysis method, and then it only needed to define the exterior boundary conditions. Thermal contact resistance between silicon and OFC blocks and LN2 flow in the cooling channel were taken into account in the cooling structure design. So the simulated results were fully consistent with the real situation. In addition, the cooled structure was subjected to a total heat load of 870W which could be applied in Beijing Advanced Photo Source.
出处
《低温与超导》
CAS
北大核心
2014年第2期26-29,共4页
Cryogenics and Superconductivity
关键词
硅晶体
接触
流固耦合传热
热变形
Silicon crystal, Contact, Fluid -solid coupling heat transfer, Thermal deformation
