US 12,313,005 B2
Fuel systems for torch ignition devices
Jason A. Ryon, Carlisle, IA (US); Lev Alexander Prociw, Johnston, IA (US); and Brandon P. Williams, Johnston, IA (US)
Assigned to Collins Engine Nozzles, Inc., Des Moines, IA (US)
Filed by Collins Engine Nozzles, Inc., Des Moines, IA (US)
Filed on Mar. 20, 2023, as Appl. No. 18/123,764.
Application 18/123,764 is a division of application No. 16/951,631, filed on Nov. 18, 2020, granted, now 11,635,027.
Prior Publication US 2023/0392552 A1, Dec. 7, 2023
Int. Cl. F02C 7/264 (2006.01); F02P 21/00 (2006.01); F23Q 9/00 (2006.01); F23R 3/36 (2006.01)
CPC F02C 7/264 (2013.01) [F02P 21/00 (2013.01); F23Q 9/00 (2013.01); F23R 3/36 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A torch igniter system for a combustor of a gas turbine engine, the torch igniter system comprising:
a housing defining a combustion chamber, wherein the housing is annular and extends along an axis;
an ignition source disposed at least partially in the combustion chamber;
a fuel injector configured to inject at least one of fuel and air into the combustion chamber and to impinge on the ignition source;
a first fluid path connecting a first fuel source to the combustion chamber;
a second fluid path connecting an air source to the fuel injector;
a third fluid path connecting a second fuel source that is liquid to the fuel injector;
a cap formed by the housing disposed at an axial end of the torch igniter system, wherein the cap receives the fuel injector;
an annular channel embedded within the cap and centered on the axis, wherein the annular channel is fluidly connected to the second fuel source that is liquid and the third fluid path includes the annular channel;
a first aperture extending through an inner wall of the housing that connects the annular channel to the combustion chamber, wherein the first aperture is embedded in the cap and the third fluid path includes the first aperture, and a first fuel from the first fuel source is injected into the combustion chamber downstream of the first aperture;
a mixing annulus configured to mix a second fuel from the second fuel source with air to atomize the second fuel before entering the combustion chamber through the first aperture;
a swirling annulus embedded within the cap and centered on the axis, wherein:
the swirling annulus is fluidly connected to the first fuel source and the first fluid path includes the swirling annulus, and
the swirling annulus annularly surrounds the first aperture; and
a second aperture extending through the inner wall of the housing that connects the swirling annulus to the combustion chamber.