Ducted Fan Engine
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Ducted Fan Engine
</dt>
An aircraft engine incorporating a fan or propeller
enclosed in a duct; especially,
a jet
engine in which an enclosed fan or propellant is used to ingest ambient
air to augment the gases of combustion in the jetstream.
</dd>
The air may be taken in at the front of the engine and passed around
the combustion section, or it may be taken in aft of the combustion chamber.
In the former case the ducted fan may be considered a type of bypass engine.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use