Patent ID: 6820431
Filing Date: 2004-11-23
Classification: F23D,F23M,F23R

Abstract:
A fuel nozzle device operable for injecting a fuel into an air stream and suitable for use in a gas turbine engine system or the like, the fuel nozzle device comprising:an orifice portion having a first cross-sectional area, Ah, and a first acoustic impedance, Z1; a tube portion having a second cross-sectional area, AT, and a second acoustic impedance, Z2; and wherein the ratio of the first cross-sectional area, Ah, of the orifice portion and the second cross-sectional area, AT, of the tube portion is selected such that the first acoustic impedance, Z1, of the orifice portion is substantially the same as the second acoustic impedance, Z2, of the tube portion.