Naslov
Numerical and experimental study of the application of roof flat-flame burners

Autori
Lazić, Ladislav ; Brovkin, Vladimir L. ; Gupalo Vjacheslav ; Gupalo, Elena, V.

Izvornik
Applied thermal engineering (1359-4311) 31 (2011), 4; 513-520

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
roof indirect heating; flat-flame burner; heat transfer; thermal efficiency

Sažetak
The objective of the work was to investigate the essential features of radiation and convection heat transfer in the chamber furnace heated with roof flat-flame burners and conventional side-fired torch burner. The effect of change in the furnace chamber height on the heat transfer rate in the furnace enclosure, particulary on the heat flux onto the heated material, was determinated numerically and experimentally. Thr results obtained by means of a computer-based mathematical model and those obtained on the laboratory chamber height from 1760 mm to 1160 mm at the low temperatures of the calorimeter surfaces, in all the heating modes, led to an increase in the heat transfer rate of 10-12 per cent, and at high temperatures of the calorimeter surface from 10 per cent (torch burner) up to 15-20 per cent (flat-flame burners). The calculations of heat fluxes onto the load surface were conducted in order to determine the real value of the coefficient of convective heat transfer from combustion gases to the load surface.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

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