Compressor bleed air exhaust ducting for gas turbine engine systems

A gas turbine engine system comprising:

• an enclosure having a plurality of walls that cooperate to define a cavity within the enclosure, the plurality of walls including a first wall formed to define an aperture therethrough,
• a compressor assembly configured to collect compressor bleed air, the compressor assembly including a compressor located within the cavity and configured to compress air received from within the enclosure and a bleed-air collector having a bleed-air manifold configured to receive a portion of the air compressed by the compressor and a bleed-air duct extending through the aperture in the first wall to direct the portion of the air through the aperture formed in the first wall of the enclosure, the bleed-air duct having a first pipe coupled to the compressor for movement with the compressor and a second pipe extending through the aperture in the first wall and arranged around the first pipe, and
• a bleed-duct joint configured to couple the bleed-air duct with the enclosure, the bleed-duct joint coupled with the second pipe and the first wall of the enclosure to locate the second pipe relative to the first pipe so that the first pipe is spaced apart from the second pipe to mechanically decouple the first pipe from the second pipe and allow for thermal growth of the first pipe during operation of the gas turbine engine system.