Authors: K. Kumar, Y. Zhang, C. J. Sung, and W. J. Pitz

Direct link to the paper: https://doi.org/10.1016/j.combustflame.2015.02.014

Abstract:

We study the influence of blending n-butanol on the ignition delay times of n-heptane and iso-octane, the primary reference fuels for gasoline. The ignition delay times are measured using a rapid compression machine, with an emphasis on the low-to-intermediate temperature conditions. The experiments are conducted at equivalence ratios of 0.4 and 1.0, for a compressed pressure of 20 bar, with the temperatures at the end of compression ranging from 613 K to 979 K. The effect of n-butanol addition on the development of the two-stage ignition characteristics for the two primary reference fuels is also examined. The experimental results are compared to predictions obtained using a detailed chemical kinetic mechanism, which has been obtained by a systematic merger of previously reported base models for the combustion of the individual fuel constituents. A sensitivity analysis on the base, and the merged models, is also performed to understand the dependence of autoignition delay times on the model parameters.

Citation: K. Kumar, Y. Zhang, C. J. Sung, and W. J. Pitz, “Autoignition Response of n-Butanol and its Blends with Primary Reference Fuel Constituents of Gasoline,” Combustion and Flame 162 (6), 2466-2479 (2015).