Patent ID: 8646275
Filing Date: 2014-02-11
Classification: F23D,F23R

Abstract:
1. A gas-turbine lean combustor comprising a combustion chamber and a fuel nozzle; the fuel nozzle comprising: a centrally positioned pilot fuel injection; a main fuel injection, wherein the main fuel injection comprises central bores for a controlled inhomogeneous fuel injection predominantly in a circumferential direction, a number of the bores on the circumference ranging from 8 to 40 and the bores having an angle of inclination δ a V-shaped flame stabilizer comprising an inner leg which is contoured in an axial direction and in the circumferential direction and comprises 2 to 20 circumferentially arranged contours in blossom form wherein the V-shaped flame stabilizer circumferentially surrounds a central axis of the fuel nozzle and is positioned between the pilot fuel injection and the main fuel injection, the flame stabilizer further comprising an outer leg radially outwardly of the inner leg, the radially inner leg and the radially outer leg connected together at an upstream portion and extending away from one another toward a downstream portion to form said V-shape in cross-section, downstream ends of both the radially inner leg and the radially outer leg being positioned downstream of an exit of the pilot fuel injection.