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Intake bleed on a supersonic inlet is used to

  • A.Increase the total mass flow to the engine
  • B.Cool the compressor
  • C.Reduce the intake noise
  • D.Remove low energy air under the shock

Answer: D

A shock impinging on a boundary layer thickens it and can separate it entirely, destroying the shock structure. Bleeding that low energy air away keeps the interaction manageable, at the cost of the drag associated with dumping it overboard.

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