METHOD OF BURNING FUEL AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2002 - IPC

FIELD: heat engineering; ignition and maintenance of combustion in combustion chambers of various power systems of gas- turbine plants, gas-turbine engines, furnaces, boilers, etc. SUBSTANCE: method consists in forming two zones of fuel-and-air mixture at shortage and excess of air by supplying fuel and air, twisting flow of fuel- and-air mixture in first zone; air and fuel are fed to first zone; part of fuel is fed before swirler; then, fuel-and-air mixture is transferred to second zone by enclosing it in limited space of gas duct; twisting the flow of fuel-and-air mixture in first zone is effected at intensity S found from the following formula: S = (ω²•D_fl)/2g≥10⁴, where ω - is angular velocity of flow twisting; D_fl - is diameter of flow of fuel-and-air mixture; g is free fall acceleration; excess air coefficient α in first zone is selected within the following range: α = G_air/(G_m•L₀) = 0,6÷1,5, where G_air - is flow rate of air through fuel burning unit; G_m - is total flow rate of fuel through fuel burning unit; L₀ - is stoichiometric coefficient. Relationship of fraction of fuel fed before swirler G₁ to total flow rate of fuel G_m is G₁/G_m = 1-0. EFFECT: low thermal factor due to effective twisting of fuel-and-air mixture, transporting it through considerable distance from fuel burning unit inlet and forming cone at outlet of this unit. 5 cl, 4 dwg