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Old 9th Sep 2015, 06:16
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CompressorSurge
 
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Question Gas Turbine Engines

Hi all. Does air density affect the performance of gas turbine engines like piston engines do? As there is a decrease in air density with altitude, there would be a decrease in performance and a loss in power as there is more fuel than air in the mixture. That is why some general aircraft have superchargers and turbochargers to boost the intake air entering the manifold.

I was reading my ATP theory book, and it is saying that the diffuser and the compressor increase the air pressure as much as possible before entering the combustion chamber. Has this got anything to do with the air density and the reduction of air density with altitude or the gas turbine engine performance are independent of air density?
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