导热反问题方法在计算瞬态传热过程中的应用

Application of Inverse Heat ConductionProblem in Transient HeatTransfer Calculating

利用Ｂｅｃｋ所提出的非线性估算方法，本文建立了一维瞬态导热过程中由固体内部一个或多个温度测点的测量值计算边界表面上未知的温度与热流密度的数学模型，编写了通用计算程序ＩＨＣＰＰ．为了验证程序ＩＨＣＰＰ的可靠性，假设在模拟压水反应堆燃料棒的电加热棒表面上施加周期性的热流密度变化，结果表明计算所得的热流密度与假设的热流密度比较一致．程序ＩＨＣＰＰ根据布置在汽水分离器筒壁内不同深度的５个热电偶在瞬态传热试验中的温度测量值计算得到了汽水两相混合物对汽水分离器内壁放热系数的关联式．

he mathematical model of calculating the unknown surface temperature and surface heat flux from one or more temperature measurements in a solid during onedimensional transient heat conduction is established in this paper using Beck′s nonlinear estimation procedure,and a general computer program IHCPP is written.In order to verify the program′s reliability,a periodic heat flux is assumed to impose on the surface of an electric heating rod which is used to simulate a fuel rod in pressurizedwater reactors.The results show that there is a close agreement between the calculated heat flux and the assumed heat flux.The heat transfer correlations between watersteam mixture and water separator inner wall during transient heat transfer experiments are obtained with program IHCPP from measured temperatures by five NiCrNiSi thermocouples inserted in water separator wall in different depths.