中空铝型材与保温复合板传热特性的数值研究  

Numerical Study on Heat Transfer Characteristics of the Hollow Aluminum Alloy and the Thermal Protection Composite Panel

作　　者：张旭燕[1] 马晓婧[1] ZHANG Xu-yan;MA Xiao-jing(Lanzhou Petrochemical College of Vocational Technology, Lanzhou Gansu 730060, China)

机构地区：[1]兰州石化职业技术学院,甘肃兰州730060

出　　处：《机械研究与应用》2016年第3期17-19,共3页Mechanical Research & Application

摘　　要：在等热流边界条件下对一个复杂的耦合换热过程—空腔内的自然对流、以及固体材料的导热模型进行数值模拟研究。结果表明:随着热流密度逐渐增大,在空气夹层区域中等温线的仅仅一小部分不是直线且等温线的扭曲幅度逐渐增大,而等温线在保温材料和装饰材料固体区域中是直线;速度矢量的长度随着热流密度增大而逐渐增大,在温差为37.08℃时速度矢量的长度比温差10.88℃时速度矢量的长度大,这些现象表明中空铝型材空气夹层内的自然对流随着温差的增大变得强烈。Numerical study is carried out to solve the complex coupled heat transfer process - natural convection in the cavity and heat conduction of solid materials with unifomi heat flux as the boundaiy condition of the hot wall. The results indicate that with the increase of heat flux, only a small fraction of the isothemis in the area of the air interlayer is not linear and the distortion of the isotherm is gradually increasing, while in the area of solid materials is a straight line; the length of velocity vector increases with the increase of temperature, that is , the length of velocity vector in the temperature difference of 37. 08 °C is longer than that of 10. 88 °C. These phenomena show that the natural convection within the hollow aluminum air gap would be intensified with increase of the temperature difference.

关 键 词：中空铝型材 传热特性 数值模拟 

分 类 号：U214.5[交通运输工程—道路与铁道工程]