Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which of the following is NOT true of chevrons?

  • A.They promote finer-scale mixing in the shear layer
  • B.They are fitted to the exhaust nozzle trailing edge
  • C.They improve cruise thrust slightly
  • D.They reduce jet mixing noise

Answer: C

Chevrons cost a small amount of thrust in cruise, which is exactly the penalty accepted for the noise benefit. The other three describe chevrons correctly, and the trade of a little thrust for quieter takeoff is one designers accept readily.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.