Mixture Formation and Auto-Ignition Behavior of Pure and Mixed Normal Paraffin Fuels

Paper #:
  • 2003-01-3096

Published:
  • 2003-10-27
DOI:
  • 10.4271/2003-01-3096
Citation:
Montajir, R., Kawai, T., Suzuki, H., Ishii, H. et al., "Mixture Formation and Auto-Ignition Behavior of Pure and Mixed Normal Paraffin Fuels," SAE Technical Paper 2003-01-3096, 2003, doi:10.4271/2003-01-3096.
Pages:
10
Abstract:
Fuel formulation for premixed charge compression ignition (PCCI) combustion has been attempted based on the mixture formation and auto-ignition behavior of normal paraffin fuels. Different pure and mixed fuels with different blending ratios are tested. The mixture formation behavior is investigated photographically in a constant volume combustion chamber (CVCC) at elevated temperature and pressure. Auto-ignition behavior is tested in a Fuel Ignition Analyzer under different test conditions.It is found that the evaporation rate of pure n-paraffin fuel increases and the ignition delay becomes longer with decreases in the chain length. In the range of test condition used in this study, the flash-boiling phenomenon affects the fuel evaporation rate and ignition delay to some extent. Based on the experimental results a mixture of a very light mixture promoting component (MPC) and a moderately dense igniting component (IC) at a ratio of 3:1 is found to be optimum for PCCI combustion.
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