抄録
It is very difficult to simultaneously reconstruct the temperature distribution and radiative properties of media and walls in an industrial furnace. Because they were intercoupling, especially, the difference of heat transfer character between wall and gas should also be considered. In this paper, four colored images were captured by four flame image detectors which were mounted in the four corners of an industrial furnace. The radiative intensity and temperature information can be obtained from four colored images based on radiation image processing technology. Then a revised Tikhonov regularization method was used to reconstruct the temperature distribution from radiative temperature information, and an optimization method was also ultilized to simultaneously reconstruct the radiative properties of media and walls from radiative intensity information. The simulation results in the different two-dimensional sections show that the temperature distribution and radiative properties involved the absorption and scattering coefficients of media and emissivity of walls can be simultaneously reconstructed at different radiative intensity measurement errors and wall temperature. And the reconstruction error can be maintained at same level with measurement error. The reconstruction results by this algorithm can illuminate the integrated, transient information of radiative heat transfer process in an industrial furnace, and it is especially suitable for online monitoring the surface temperature, such as walls, billets or tubes.
