Gas turbine engine combustor heatshield

Details Gas turbine engine combustor heatshield Gas turbine engine combustor heatshield

1995-02-24

1996-04-23

Thorpe, Timothy S.

Power plants

Combustion products used as motive fluid

Combustion products generator

60756, F23R 304

Patent

active

055092705

ABSTRACT:
A gas turbine engine annular combustor has a bulkhead at its upstream end which is protected by an annular array of heatshield segments. The segments are spaced apart from the bulkhead by means of a plurality of flanges. Cooling air apertures provided in the bulkhead direct cooling air into the space between the heatshield and the bulkhead. A portion of the cooling air is directed on to the downstream face of heatshield by means of a plurality of radially extending slots disposed around a fuel nozzle aperture in the centre of each heatshield segment. The slots provide for unrestrained thermal expansion of the heatshield region immediately surrounding the fuel nozzle aperture, thereby to prevent excessive thermal hoop stresses developing in the heatshield during engine operation.

REFERENCES:
patent: 4322945 (1982-04-01), Peterson et al.
patent: 4365470 (1982-12-01), Matthews et al.
patent: 5253471 (1993-10-01), Richardson
patent: 5271220 (1993-12-01), Holmes et al.

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