Why don't Turbojet engines use the De Laval Nozzle?

Asked May 02 '12 at 11:26

Active May 02 '12 at 12:04

Viewed 735 times

In fact, it seems that in a typical turbojet, the output nozzle contracts, not expands.

As the temperature of exhaust gases is high -- it should be possible to extract more energy out of it in this case.

edited May 02 '12 at 12:04

Manishearth

asked May 02 '12 at 11:26

BarsMonster

2

http://en.wikipedia.org/wiki/Turbojet#Nozzle says that De Laval Nozzle can be more efficient, but is often not used because weight, complexity, and that the shape of the nozzle needs to be variable for different throttling. – Willie Wong May 02 '12 at 12:48

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