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The combustor of a gas turbine adds heat at

  • A.Nearly constant pressure
  • B.Constant volume
  • C.Constant temperature
  • D.Rising pressure

Answer: A

The Brayton cycle idealises combustion as constant pressure, and a real chamber loses perhaps three to six per cent of the total pressure through it. That loss matters because every one per cent costs rather more than one per cent of the engine's thrust.

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