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Study on the Laminar Characteristics of Ethanol, n-Butanol and n-Pentanol Flames

Xi’an Jiaotong University-Qianqian Li, Yu Cheng, Wu Jin, Zhaoyang Chen, Zuohua Huang
Published 2015-09-01 by SAE International in United States
Due to serious energy crisis and pollution problem, interest in research of the alternative fuels is increasing over the world. Alcohol fuels are always considered to be promising alternative fuels. Lower alcohols owning high octane number is good octane enhancer for SI (Spark ignition) engine, however is difficult to be used in CI (Compression Ignition) engines. Higher alcohols like pentanol with higher energy content, poor water solubility and higher cetane number are good choice for the CI engines. In this study, laminar flame behaviors of ethanol-air, n-butanol-air and n-pentanol-air mixtures at 393 K and 0.1 MPa are compared and analyzed with the spherical propagating flames. Comparison of the laminar flame speeds measured in the previous studies (Li et al.) show that laminar flame speed of ethanol is the fastest with slower flame speed of n-butanol and n-pentanol at lean mixture. At rich mixture, three alcohols present very close values. The effective Lewis number of n-pentanol is the biggest, and then n-butanol and ethanol. The difference among the three fuels is decreasing with the increase of…
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Research for Smoke Reduction At Acceleration of Vehicle With Turbocharged Diesel Engine

Isuzu Motors Ltd.-Toshio Ichimasa, Shiro Ishida
Shanghai Jiao Tong Univ.-Yu Cheng
  • Technical Paper
  • 908009
Published 1990-05-15 by Society of Automotive Engineers of Japan in Japan
In this study, a new experimental method has been found out, by which fuel flow during acceleration can be changed arbitrarily. Fuel flow characteristics have been optimized to get less smoke level at the same acceleration condition.A new device of injection pump which realizes these characteristics is proposed.