COMPUTER-PROGRAM FOR THE TEMPERATURE DISTRIBUTION WITHIN THE FIN OF WATER WALL

The interaction by heat transfer between combustion gases-solid partic les as one multiphase system and steam-water mixture as the other, thr ough a rectangular metal wall, has been analyzed. A second order parti al differential equation has been solved by a finite difference ADI sc heme with variable iteration parameter. A series of computer programs for the temperature fields prediction within the metal has been develo ped in Decart 2-D system of coordinates. It was discussed for which of the engineering problems and physical systems this kind of considerat ion and these programs could be used as well as which of the calculati ons and parametric studies could be done. One of the developed compute r programs has been presented and applied to the separated tube fin of water wall in a boiler furnace. The series of calculations has been d one. It has been found that the temperatures of the fin considerably v ary not only inside the metal but also along the fin surfaces. The con cept of taking one uniform temperature of water wall as a boundary con dition in the heat transfer analysis of the combustion gases-solid par ticles system in the furnaces (so far widely used in many studies) sho uld be reviewed. As the fin was taken apart from the tube and separate ly analyzed, the obtained predictions will be compared with the result s produced by the analysis of fin-tube integrated geometry. This is an other study and the subject of the papers to be published.