A general method for solving transient multidimensional inverse heat transfer problems
A general method for solving transient multidimensional inverse heat transfer problems
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DOI：
10.1016/j.ijheatmasstransfer.2015.09.029
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发表时间：
2016-02
影响因子：
5.2
通讯作者：
P. Duda
中科院分区：
文献类型：
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作者：
P. Duda
本工作的目的是建立一个简单的方法，可用于求解反瞬态热流问题。该算法可以根据构件外表面或内部选定点的测量温度重建整个构件的瞬态温度分布。所提出的方法允许使用商业计算程序。本文采用ANSYS Multiphysics软件进行有限元分析。线性和非线性有限元都被使用。未知边界条件可以假设为阶梯函数或多项式函数。由于采用了有限元方法，该方法可以应用于具有温度相关热物理性质的复杂形状体。给出了瞬态热传导和瞬态热流通过传导和辐射识别的数值实例。所提出的方法可以优化电源块的关闭和启动操作。它还有助于减少这些操作过程中的热量损失，延长电源块的使用寿命。
The purpose of this work is to formulate a simple method, which can be used for the solution of an inverse transient heat flow problem. The proposed algorithm allows to reconstruct the transient temperature distribution in a whole structure element based on measured temperatures at selected points on the outer surface or inside in the component. The presented method allows for the use of commercial calculation programs. In this work, ANSYS Multiphysics software, that utilizes finite element method (FEM) is applied. Both linear and nonlinear finite elements have been used. The unknown boundary condition can be assumed as a staircase function or a polynomial function. Due to the implementation of the finite element method, the proposed method can be applied to complex-shape-bodies with temperature-dependent thermophysical properties. Numerical examples of the identification of transient heat conduction and simultaneous transient heat flow by conduction and radiation will be presented. The presented method allows to optimize the power block’s shut-down and start-up operations. It also contributes to the reduction of heat loss during these operations and the extension of the power block’s life span.