40 CHEMISTRY ADVANCED PROPULSION SYSTEMS CHEMICAL REACTION KINETICS KNOCK CONTROL PROGRESS REPORT SPARK IGNITION ENGINES
A major obstacle to improving spark ignition engine efficiency is the limitations on compression ratio imposed by tendency of hydrocarbon fuels to knock (autoignite). A research program investigated the knock problem in spark ignition engines. Objective was to understand low and intermediate temperature chemistry of combustion processes relevant to autoignition and knock and to determine fuel property effects. Experiments were conducted in an optically and physically accessible research engine, static reactor, and an atmospheric pressure flow reactor (APFR). Chemical kinetic models were developed for prediction of species evolution and autoignition behavior. The work provided insight into low and intermediate temperature chemistry prior to autoignition of n-butane, iso-butane, n-pentane, 1-pentene, n-heptane, iso-octane and some binary blends. Study of effects of ethers (MTBE, ETBE, TAME and DIPE ) and alcohols (methanol and ethanol) on the oxidation and autoignition of primary reference fuel (PRF) blends.
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Title
Fuel property effects on engine combustion processes. Final report
Creators
N.P Cernansky
D.L Miller
Drexel Univ., Philadelphia, PA (United States). Dept. of Mechanical Engineering
Publisher
United States
Resource Type
Report
Language
English
Academic Unit
C. and J. Nyheim Plasma Institute; Mechanical Engineering and Mechanics; College of Engineering