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The Effect of Compression Ratio on Knock Limits of High-Performance Fuels in a CFR Engine II : Blends of 2,2,3-Trimethylpentane with 28-RThe knock-limited performance of blends of 0,50; and 100 percent by volume of 2,2,3-trimethylpentane in 28-R fuel determined with a modified F-4 engine at three sets of conditions varying from severe to mild at each of three compression ratios (6.0, 8.0, and 10.0). A comparison of the knock-limited performance of 2,2,3-trimethylpentane with that of triptane (2,2,3-trimethylbutane) is included. The knock-Limited performance of 2,2,3-trimethylpontane was usually more sensitive to either compression ratio or inlet-air temperature than 28-R fuel, but the ratio of the knock-limited indicated mean effective pressure of a given blend containing 2,2,3-trimethypentane and 28-R to the indicated mean effective pressure of 28-R alone was not greatly affected by compression ratio if the engine operating conditions were mild. Although 2,2,3-trimethylpentane in general had a lower knock-limited performance than triptane, the characteristics of the two fuels were somewhat similar.
Document ID
19930093586
Acquisition Source
Legacy CDMS
Document Type
Other - NACA Wartime Report
Authors
Tower, Leonard K
Date Acquired
September 6, 2013
Publication Date
February 10, 1945
Subject Category
Propellants And Fuels
Report/Patent Number
NACA-MR-E5A10
NACA-WR-E-249
Accession Number
93R22876
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
FUELS, ANTIKNOCK
FUELS - TRIPTANE
ENGINES, TEST - WAUKESHA CRF
ENGINES - COMPRESSION RATIO
FUELS - GASOLINE - 28-R
FUELS - DIMETHYLPENTANE
COMMITTEES - NACA - SUBCOM ON AIRCRAFT FUELS & LUBRICANTS (AMER )
ENGINES - PERFORMANCE EFFECT OF ANTIKNOCK FUELS
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