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A swirler at the fuel injector serves to

  • A.Create a recirculation zone that anchors the flame
  • B.Increase the velocity of the incoming air
  • C.Cool the flame tube wall
  • D.Atomise the fuel by centrifugal action alone

Answer: A

Swirling flow sets up a central recirculation that carries hot products back towards the injector and continuously reignites the incoming mixture. Without that recirculation the flame would simply be swept downstream and blown out.

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