摘要
建立一种基于有限容积法的辐射角系数数值计算模型,可直接计算任意面积大小任意夹角平面间辐射角系数,通过算例验证了该计算模型具有较高的计算精度;在一般散热器或空调采暖制冷的典型建筑空间结构条件下,对室内壁面与窗口间辐射换热进行了分析计算,发现随着室内壁面对玻璃窗口表面辐射角系数的增大,室内壁面与窗口表面间净辐射热流强度和辐射换热系数逐渐降低.
A numerical model on view factor is presented based on finite volume method.The view factor between plan surfaces with free area and included angle can be directly calculated and obtained.Calculation accuracy of the model is validated well through several calculation cases.For the heating and cooling way of radiator or air-condition in the classical building room and through analyzing and calculation,it is found that the net radiation heat flux and the radiation heat transfer coefficient decrease gradually with the increasing view factor between the inside room surfaces and inside glazing surface,but the decreasing range is relatively small.
出处
《兰州交通大学学报》
CAS
2012年第6期126-129,共4页
Journal of Lanzhou Jiaotong University
基金
兰州交通大学青年科学基金(2012017)
兰州交通大学大学生科技创新基金(DXS2012-027)
关键词
辐射角系数
辐射换热
数值计算
有限容积法
view factor
radiation heat transfer
numerical calculation
finite volume method
