Title

Isobutane Ignition Delay Time Measurements At High Pressure And Detailed Chemical Kinetic Simulations

Keywords

Ignition delay; Isobutane; Modeling; N-Butane; Oxidation; Rapid compression machine; Shock-tube

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. © 2010 The Combustion Institute.

Publication Date

8-1-2010

Publication Title

Combustion and Flame

Volume

157

Issue

8

Number of Pages

1540-1551

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.combustflame.2010.01.011

Socpus ID

77953808899 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77953808899

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