Patent ID: 8181440
Filing Date: 2012-05-22
Classification: F02C,F05D,F23D,F23R

Abstract:
1. An igniter plug arrangement for a gas turbine engine comprising: an igniter plug including a semiconductor disposed in a shell, a lower end of the semiconductor including a first outer circumferential surface, a second outer circumferential surface, and a frustoconical surface connecting the first and the second outer circumferential surfaces, and a lower end of the shell presenting a first inner circumferential surface, a second inner circumferential surface, a frustoconical surface connecting the first and the second inner circumferential surfaces, and a flat end surface perpendicular to an axis of the igniter plug; a duct secured to a combustion chamber of the gas turbine engine; and a floating sleeve via which the igniter plug is mounted in the duct, the floating sleeve including a first upper disk, a second lower disk, and a cylindrical part connecting the first upper and second lower disks, and an internal wall of the floating sleeve and an external surface of the shell defining an annular cavity of the floating sleeve, wherein the first outer circumferential surface of the semiconductor abuts the first inner circumferential surface of the shell, and a first portion of the frustoconical surface of the semiconductor abuts the frustoconical surface of the shell, wherein a second portion of the frustoconical surface of the semiconductor, the second inner circumferential surface of the shell, and the flat end surface of the shell define an annular igniter plug cavity, and wherein a first set of orifices are provided in the lower end of the shell such that the annular igniter plug cavity is in communication with the annular cavity of the floating sleeve and a second set of orifices are provided in the flat end surface of the shell.