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本文提出了一种在介质辐射特性已知的条件下，由壁面入射辐射热流的测量值反演燃烧室内三维温度场的方法。该方法是在辐射传递方程离散坐标近似的基础上，用求目标函数极小值的共轭梯度法进行反演计算。通过对吸收系数、散射不对称因子、反照率、壁面黑度和燃烧室大小尺寸等参数对反演精度影响的分析，结果表明，即使存在随机测量误差，这些参数对温度场反演精度的影响也不大，本文所提出的方法可较精确地反演燃烧室内三维温度场。
In this paper, a method is proposed to invert the three-dimensional temperature field in the combustion chamber from the measurement of incident radiative heat flux on the wall under the condition that the medium’s radiation characteristics are known. The method is based on the approximation of discrete coordinates of the radiation transfer equation, and is calculated by using the conjugate gradient method that requires the minimum of the objective function. The influence of parameters such as absorption coefficient, scattering asymmetry factor, albedo, wall surface blackness and combustion chamber size on the inversion accuracy is analyzed. The results show that even if there is random measurement error, the influence of these parameters on the temperature field inversion accuracy Nor is it large. The method proposed in this paper can accurately reflect the three-dimensional temperature field in the combustion chamber.