煤粉炉内辐射图象处理和燃烧过程数值模拟相结合初探

INTEGRATION OF RADIANT IMAGE PROCESSING AND NUMERICAL SIMULATION OF COMBUSTION PROCESSES IN PC-FIRED FURNACES

The scientific meaning and practicality of integration of radiant image processing andnumerical simulation of combustion processes in pulverized-coal-fired furnaces are discussed.Through taking account of radiation emitted from wall surface and the uneven distributionof radiant characteristics of two-phase medium in furnaces, an equation relating 2 - Dmonochromatic radiant images and 3 - D combustion processes in furnaces is improved.Numerical simulation technique will be used to estimate the spacious distribution of theradiative characteristics of the two-phase medium in furnaces, and the measuring methodof 3 - D temperature distribution is improved. Taking the radiant images as a kind of"radiative boundary" for numerical simulation of combustion processes, it will be possible toassess different models of combustion reaction and different calculation methods of radiativeheat transfer. Using two sets of radiant image processing devices with filters of differentcentral wavelengths, different solid and gas temperature distributions could be obtainedsimultaneously. These considerations will be helpful for experimental study and numericalsimulation of combustion processes in pulverized-coal-fired furnaces-