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焦炭塔瞬态温度场的分析 总被引:2,自引:0,他引:2
由于循环的温度变化产生的严重温度梯度是导致焦炭塔出现鼓胀和开裂的主要原因之一.与以往文献的有限元分析不同,从二维热传导理论出发,获得了焦炭塔的轴向和径向二维瞬态温度场的解析解.所考虑的焦炭塔塔体为有限长,并采用迭代法模拟进油阶段和进水阶段中由于液面不断上升引起的动态边界条件.数值结果分析表明,该文理论模型能正确描述焦炭塔瞬态温度场的基本特征.同时,探讨了几何尺寸和冷却水升速对轴向温度梯度的影响. 相似文献
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Analysis of transient temperature field in coke drums 总被引:1,自引:0,他引:1
One of the primary reasons leading to bulging and cracking in a coke drum is the severe temperature gradient due to cyclic temperature variation. Based on the twodimensional heat conduction theory, an analytical solution of the transient temperature field in the coke drum is obtained, which is different from the known FEM results. The length of the coke drum is considered finite. The dynamic boundary conditions caused by fluid uninterrupted rising in oiling and watering stages are simulated with the iteration method. Numerical results show that the present theoretical model can accurately describe basic features of the transient temperature field in the coke drum. Effects of the geometry of the coke drum and the rising velocity of quench water on the axial temperature gradient are also discussed. 相似文献
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研究了线性温变作用下椭圆夹杂的热弹性问题。通过构造辅助函数,将复变函数的分区全纯函数理论,Riemann边值问题和Cauchy型积分相结合,求得各分区之间的解析关系,从而获得了无穷远均匀加载和线性温变共同作用下椭圆夹杂平面热弹性场的封闭形式解。从本文解答的特殊情况可直接得到已有的若干结果,并可得到一些具有实际意义的新结果。本文发展的分析方法,为求解复杂多连通域的平面热弹性问题提供了一条有效途径。 相似文献
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