bypass duct


Also found in: Wikipedia.

bypass duct

A cold stream duct. The air from the fan that flows outside the combustion chamber and helps cool it as well as the exhaust duct. Also called an exhaust duct on a turbofan engine. See bypass engine.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The typical type of ACE consists of a third bypass duct and more variable geometries than the VCE [2, 3, 21, 22].
Different from three-stream ACE, it has the third bypass duct, front VABI, and the core-driven fan stage (CDFS) [3].
The most promising configuration involves the use of deflector vanes installed near the bypass duct that cause the bypass plume to tilt relative to the core plume.
Tilting the bypass stream is possible by means of fixed or variable vanes installed near the exit of the bypass duct. Two types of deflectors have been investigated so far: airfoil-shaped vanes mounted at various azimuth angles and a wedge-shaped deflector located at the top of the nozzle.
Next, disconnect the round bypass duct (if equipped) coming into the old unit.
The remaining and larger part of the air flowed through an annular bypass duct between the core of the engine and its nacelle.
Where the core, high-velocity air stream meets the lower-velocity air coming out of the fan bypass duct, a layer of turbulence is created called the shear layer.
The bypass type with a drain, which we show in our how-to photos, relies on a bypass duct (shown in orange) that circulates warm air through a wet grid inside the humidifier Fig.
Cost is minor, involving a few motorized dampers and bypass ducts.