基于非稳态传热过程的真空玻璃性能建模  

Modeling of vacuum glazing based on unsteady-state heat transfer

作　　者：杜萍[1] 王磊[1] 王元麒[2] 

机构地区：[1]海南大学信息科学技术学院海南省特种玻璃重点实验室,海口570228 [2]米兰理工大学,意大利米兰20133

出　　处：《真空》2016年第4期45-48,共4页Vacuum

基　　金：国家自然科学基金(61463011);国家重点研发计划课题(2016YFC0700804)

摘　　要：由于真空玻璃的导热系数测量复杂,本文提出一种基于非稳态传热过程的软测量表征真空玻璃导热系数的模型。首先,在连续介质与半无限大物体的前提下,采用能量守恒定律与拉普拉斯变换法,对数学物理模型进行求解,建立非加热面的中心温度计算公式。然后,利用数值仿真软件FLUENT对物理模型进行温度场仿真。仿真结果表明:检测时间少于5分钟,达到节约时间的目的;为保证温度测量准确,取多个测量点的测量值;为减小测量误差,采用圆形加热片时,加热片的半径与真空玻璃厚度之比要大于3。这些为后续研究真空玻璃导热系数与温度变化之间的关系奠定一定的理论和应用基础,对实验有指导意义,为真空玻璃导热系数的在线检测和其过程的优化控制提供指导。This work presents a characterization of unsteady-state heat transfer model for thermal conductivity of vacuum glazing due to the complex measurement. First of all, on the premise of continuum and semi-infinite body, the law of conservation of energy with the Laplace transform method was used to solve mathematical and physical models, a formula of the center temperature of the non-heating surface was established. Then, the temperature field of the physical model was simulated by FLUENT. The simulation results show that the detection time is less than 5 minutes achieving the purpose of saving time. To ensure accurate temperature measurements, multiple measurement points were taken to measure. In order to reduce measurement error, the ratio of heating plates and vacuum glazing thickness must be greater than 3. This study lays a foundation for theory and application, and is useful for online inspection as well as optimal control.

关 键 词：真空玻璃 非稳态传热 计算流体力学仿真 导热系数 

分 类 号：TB771[一般工业技术—真空技术]