Experimental and Modeling Study on Auto-Ignition of DME/n-Butane Blends under Engine Relevant Pressure

Paper #:
  • 2014-01-1470

Published:
  • 2014-04-01
DOI:
  • 10.4271/2014-01-1470
Citation:
Jiang, X., Zhang, Y., Pan, L., Man, X. et al., "Experimental and Modeling Study on Auto-Ignition of DME/n-Butane Blends under Engine Relevant Pressure," SAE Technical Paper 2014-01-1470, 2014, doi:10.4271/2014-01-1470.
Pages:
8
Abstract:
In this study, the ignition delay times of DME/n-C4H10 fuel blends (neat DME, 50/50 and neat n-C4H10) diluted with argon were measured behind reflected shock waves. The experiments were performed in the temperature range of 1250 - 1600 K, at pressure of 2.0 MPa and equivalence ratios from 0.5 to 2.0. A latest kinetic mechanism NUIG Aramco Mech 1.3 was validated against the present ignition data and used to conducted chemical kinetic analysis. Different equivalence-ratio-dependent was exhibited at different temperature regimes for DME, n-C4H10, and their blend. Fuel flux analysis, sensitive analysis and mole fraction analysis were carried out for understanding the interaction between the ignition chemistries of DME and n-C4H10.
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