International Conference
"Modern Problems of Applied Mathematics and Mechanics: Theory, Experiment and Applications", devoted to the 90th anniversary of professor Nikolai N. Yanenko

Anufriev I.   Salomatov V.   Anikin Y.   Krasinsky D.   Sharypov O.   Enkhjargal K.  

Modeling of flow structure in vortex furnace

Reporter: Anufriev I.

The torch burning technology of pulverized-coal fuel in vortex flux is one of the most prospective and environmentally-friendly burning technologies of low-grade coals. In vortex furnace plants the vortex transfer is aerodynamic basis of all burning process. Appropriate organization of aerodynamics can influence on stability of temperature and heat flux distribution, can increase a slag catching, and also can reduce a level of toxin emissions. The work is devoted to physical and mathematical modeling of interior aerodynamics of vortex furnace of heat-and-power steam generator.
Research was carried out on the air isothermal model, which was geometrically similar to one section of the experimental-industrial boiler TPE-427 of Novosibirsk TPS-3 (d = 0.29 m). The model is made from organic glass, on the front wall of which two nozzles (through which compressed air is injected) are placed symmetrically. The Laser Doppler Measuring System was used for non-contact measurement of vortex flow characteristics. Micro drops of special liquid on basis of glycerin generated by smoke machine were used as tracers. Two velocity components (in different cross-sections of the model) were measured. Reynolds number was 300 000. Coanda effect (flame attachment to one of the wall), which can brings to negative consequences in practice, was found. Numerical simulation of the 3-D turbulent isothermal flow was carried out with using of Fluent-suite. The distributions of the main flow characteristics (velocity, pressure, turbulent kinetic energy) were studied, experimental data and results of calculations were compared. The agreement of numerical calculation with experimental data was attained on high-level.