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The Effect of Piston-Head Temperature on Knock-Limited PowerTo determine the effect of piston-head temperature on knock-limited power. Tests were made in a supercharged CFR engine over a range of fuel-air ratios from 0.055 to 0.120, using S-3 reference fuel, AN-F-28, Amendment-2, aviation gasoline, and AN-F-28 plus 2 percent xylidines by weight. Tests were run at a compression ratio of 7.0 with inlet-air temperatures of 150 F and 250 F and at a compression ratio of 8.0 with an inlet-air temperature of 250 F. All other engine conditions were held constant. The piston-head temperature was varied by circulation of oil through passages in the crown of a liquid-cooled piston. This method of piston cooling decreased the piston-head temperature about 80 F. The data are not intended to constitute a recommendation as to the advisability of piston cooling in practice.
Document ID
20050019668
Acquisition Source
Langley Research Center
Document Type
Other - NACA Wartime Report
Authors
Imming, Harry S.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
July 1, 1944
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NACA-ARR-E4G13
NACA-WR-E-35
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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