Impellers in Gas Turbine (turboprop) Engines
Some turboprop engines use an impeller instead of an axial compressor. For example the Pratt & Whitney Canada PW100 uses a two-stage compressor with a low power impeller discharging air pressure on the high power impeller which compresses the air again into the combustion chamber. The fuel is mixed in at over 200 psi (1,400 kPa) and the mixture burns in the combustion chamber. The reason for using an impeller instead of an axial compressor is that the engine's length can be reduced.
Read more about this topic: Impeller
Famous quotes containing the words gas and/or engines:
“Droning a drowsy syncopated tune,
Rocking back and forth to a mellow croon,
I heard a Negro play.
Down on Lenox Avenue the other night
By the pale dull pallor of an old gas light”
—Langston Hughes (1902–1967)
“America is like one of those old-fashioned six-cylinder truck engines that can be missing two sparkplugs and have a broken flywheel and have a crankshaft that’s 5000 millimeters off fitting properly, and two bad ball-bearings, and still runs. We’re in that kind of situation. We can have substantial parts of the population committing suicide, and still run and look fairly good.”
—Thomas McGuane (b. 1939)