Patent ID: 6098407
Filing Date: 2000-08-08
Classification: F23C,F23D

Abstract:
A premixing fuel injector for a turbine engine, comprising:a scroll assembly; anda centerbody radially spaced from the scroll assembly and cooperating therewith to define a mixing chamber for mixing a primary fuel with a primary airstream, the centerbody including:a base having a fuel outlet;a shell extending axially from the base to define the radially inner extremity of the mixing chamber and the radially outer extremity of a secondary air supply conduit;an insert having a fuel inlet, the insert being axially spaced from the base, circumscribed by the shell and positively secured to the shell; anda fuel supply tube extending through the conduit and having an intake end and a discharge end, the intake end of the tube being positively secured to the base by a first joint to establish fluid communication between the fuel outlet and the tube, the discharge end of the tube being positively secured to the insert by a second joint to establish fluid communication between the tube and the fuel inlet, the fuel supply tube being curved in at least two dimensions to accommodate dissimilar dimensional changes between the shell and the fuel supply tube.