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本文在建立圆管二维瞬态传热模型的基础上,将反问题转化成正问题和最优化问题.采用有限元方法求解导热正问题,利用外壁面温度分布,从目标函数的泛函变分出发,根据共轭梯度法,实现了圆管内部的流体温度识别.通过典型算例的数值计算,验证了方法的准确性和抗噪性.

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