饱水文物一次干燥过程的数值模拟

Numerical simulation of the primary drying process of waterlogged artifacts unearthed

冷冻干燥是一种很好的保存出土的饱水文物的方法,因为它能有效防止收缩、开裂、断裂等现象的发生。本文建立了采用辐射加热方式的文物一次干燥过程的物理模型,并用有限元计算软件进行了数值模拟,探讨了文物的形状、尺寸、辐射板温度等因素对干燥时间的影响。利用一定条件下的计算结果,对在一次干燥期间可能出现的最高温度与加热温度、干燥箱内壁温度的关系进行了回归。

Freeze-drying process is highly efficient to the preservation of waterlogged artifacts unearthed,because it can prevent the artifacts from contraction,cracking and fracture effectively.A physical model was developed for the primary drying process of the artifacts via radiant heating,then a numerical simulation was carried out with a finite element software to discuss the impacts of the shape and size of artifact and the temperature of panel radiator on drying time.Based on the numerical results under certain conditions,a regression analysis was made for the relationships between the possible highest temperature in the primary drying process and between the heating temperature and the wall temperature of drying chamber.