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A cannular or tubo-annular combustor has

  • A.Several flame tubes within one annular casing
  • B.One flame tube in one casing
  • C.Separate casings for each tube
  • D.No flame tubes at all

Answer: A

Correct answer: Several flame tubes within one annular casing

The cannular or tubo-annular arrangement is the compromise between the two extremes. It keeps the separate flame tubes of the can design, so each can be developed and tested on its own, while enclosing them in a single annular casing, which saves the length and weight of separate casings. Interconnectors between the tubes allow the flame to spread at light-up.

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