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膜式水冷壁传热边界条件对现代电站锅炉安全运行有重要影响。针对其难以直接测量的现状,采用共轭梯度法对膜式水冷壁的传热边界条件进行了反演,并讨论了测点数目、待反演参数的初始猜测值及测量误差对反演结果及向火侧金属外壁温度分布的影响。结果表明:增加测点数可提高反演精度,而3个测点即可达到较高精度;反演结果对初值有一定的依赖性;在一定的测量误差范围内,共轭梯度法仍能够得到较满意的结果。
Membrane water wall heat transfer boundary conditions have an important impact on the safe operation of modern power station boilers. In view of its difficult situation of direct measurement, the conjugate gradient method was used to invert the heat transfer boundary conditions of membrane wall. The number of measuring points, the initial guess of the parameters to be inverted and the measurement error were discussed. And to the fire side of the metal wall temperature distribution. The results show that increasing the number of measuring points can improve the inversion accuracy, but the accuracy of the three measuring points can reach higher accuracy. The inversion results have certain dependence on the initial value. Within a certain measurement error range, the conjugate gradient method can still Get more satisfactory results.