Fan disc is the name given to the part of a jet engine that does the actual propulsion. It can also be called a fan blade, but this tends to be saved for the kind of fan that might be used domesticaly. A Pratt and Whitney turbofan engine for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine muffles noise and allows exhaust to escape. ...
[edit]
See also
United Airlines flight 232, which crashed after the fan disc in its number two engine shattered and took out all hydraulic systems. United Airlines flight 232 was a scheduled flight operated by United Airlines between Denver and Philadelphia via Chicago. ...
When the impeller rotates, air that enters the fan near the shaft is moved away perpendicularly from the shaft and out of an opening in the scroll-shaped fan casing.
In China an early form of the hand fan was a row of feathers mounted in the end of a handle; in Greece linen was often stretched over a leaf-shaped frame; and in Rome wooden fans, gilded and painted, were used.
After 1500 the fan became generally popular; flag fans, disk-shaped fans, and tuft fans of ostrich plumes or peacock feathers, with handles of carved ivory or gold set with jewels, were common in women’s wardrobes.
Fan blades are typically made of either a metal, such as titanium, or a composite material.
However, this means that the centrifugal loads from both the fan blade airfoils and the platforms must be carried by the fan blade dovetails, which requires that the dovetails be suitably large, which in turn requires a suitably large rotor disk for accommodating all of the centrifugal loads within acceptable stress limits.
Disposed downstream of the fan assembly 12 is a conventional booster compressor 26 having axially spaced apart vane and blade rows, with the blades thereof being joined to a booster spool or shaft 28.
Feeds |
Contact