Autoignition Chemistry of the Hexane Isomers: An Experimental and Kinetic Modeling Study

Paper #:
  • 952406

Published:
  • 1995-10-01
Citation:
Curran, H., Gaffuri, P., Pitz, W., Westbrook, C. et al., "Autoignition Chemistry of the Hexane Isomers: An Experimental and Kinetic Modeling Study," SAE Technical Paper 952406, 1995, https://doi.org/10.4271/952406.
Pages:
14
Abstract:
Autoignition of the five distinct isomers of hexane is studied experimentally under motored engine conditions and computationally using a detailed chemical kinetic reaction mechanism. Computed and experimental results are compared and used to help understand the chemical factors leading to engine knock in spark-ignited engines and the molecular structure factors contributing to octane rating for hydrocarbon fuels. The kinetic model reproduces observed variations in critical compression ratio with fuel structure, and it also provides intermediate and final product species concentrations in much better agreement with observed results than has been possible previously. In addition, the computed results provide insights into the kinetic origins of fuel octane sensitivity.
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