Gas turbine engine ignition flameholder with internal impingement cooling
AssigneeGeneral Electric Company
InventorsIvan E. Woltmann, Jeffrey C. Mayer, John A. Manteiga
Life of this patent
Estimating the term…
Abstract
A cooled ignition flameholder assembly includes a first heat shield having first and second spaced apart chambers. A fuel spraybar is disposed inside the first chamber, and a hollow baffle is disposed inside the second chamber. A second heat shield is joined to the first heat shield for closing the second chamber with the baffle therein. The baffle includes an inlet for receiving cooling air which is discharged through a plurality of outlet holes for impingement cooling the first and second heat shields. An ignition bulb is disposed adjacent to the second chamber and receives an igniter tip and a fuel injector tip for initiating combustion.
Claims10
An ignition flameholder for a gas turbine engine comprising:
- a radially extending first heat shield including a support end for being mounted to an annular casing;
- an elongate, enclosed, first chamber;
- an elongate, second chamber separated from said first chamber by a septum and having an access opening along one side thereof;
- a fuel spraybar disposed in said first chamber for discharging fuel from said first heat shield;
- a hollow baffle disposed inside said second chamber and having an inlet at one end thereof for receiving cooling air, and a plurality of outlet holes therein for discharging said cooling air;
- a radially extending second heat shield joined to said first heat shield for closing said access opening, and disposed adjacent to said outlet holes for being impingement cooled thereby;
- an igniter extending in said second chamber and having an igniter tip for initiating combustion;
- a fuel injector extending in said second chamber and having an injector tip for injecting fuel;
- an ignition bulb disposed adjacent to said second chamber and having a pair of ports for receiving respective ones of said igniter and injector tips, said ignition bulb being sized for providing a sheltered zone therein for allowing said igniter tip to initiate combustion therein.
Dependencies are inferred from the claim text.