Isobutane ignition delay time measurements at high pressure and detailed chemical kinetic simulations

    Authors

    D. Healy; N. S. Donato; C. J. Aul; E. L. Petersen; C. M. Zinner; G. Bourque;H. J. Curran

    Comments

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    Abbreviated Journal Title

    Combust. Flame

    Keywords

    Isobutane; n-Butane; Oxidation; Modeling; Ignition delay; Shock-tube; Rapid compression machine; RAPID COMPRESSION MACHINE; SHOCK-WAVES; GAS-PHASE; OXIDATION; DECOMPOSITION; AUTOIGNITION; MECHANISM; PROPANE; BUTANE; Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical

    Abstract

    Rapid compression machine and shock-tube ignition experiments were performed for real fuel/air isobutane mixtures at equivalence ratios of 0.3, 0.5, 1, and 2. The wide range of experimental conditions included temperatures from 590 to 1567 K at pressures of approximately 1, 10, 20, and 30 atm. These data represent the most comprehensive set of experiments currently available for isobutane oxidation and further accentuate the complementary attributes of the two techniques toward high-pressure oxidation experiments over a wide range of temperatures. The experimental results were used to validate a detailed chemical kinetic model composed of 1328 reactions involving 230 species. This mechanism has been successfully used to simulate previously published ignition delay times as well. A thorough sensitivity analysis was performed to gain further insight to the chemical processes occurring at various conditions. Additionally, useful ignition delay time correlations were developed for temperatures greater than 1025 K. Comparisons are also made with available isobutane data from the literature, as well as with 100% n-butane and 50-50% n-butane-isobutane mixtures in air that were presented by the authors in recent studies. In general, the kinetic model shows excellent agreement with the data over the wide range of conditions of the present study. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

    Journal Title

    Combustion and Flame

    Volume

    157

    Issue/Number

    8

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    1540

    Last Page

    1551

    WOS Identifier

    WOS:000279300800009

    ISSN

    0010-2180

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