Title

A Shock-Tube Study Of The Ignition And Oxidation Characteristics Of Co/H2 Fuel Blends In Air

Abstract

Ignition and oxidation characteristics of CO/H2 fuel blends were studied using both experimental and computer simulation methods. Shock-tube experiments were conducted behind reflected shock waves at intermediate temperatures (890 < T < 1285) and pressures near 1 atm. Emission in the form of chemiluminescence from the hydroxyl radical (OH∗) A2σ+ → X2 φ transition near 307 nm was used to monitor reaction progress from which ignition delay times were determined. In addition to the experimental analysis, chemical kinetics modeling was completed to compare existing chemical kinetics mechanisms to the new experimental results. The models were in good agreement with the shock-tube data, especially at higher temperatures, yet there was a tendency for the models to over predict the ignition delay time at lower temperatures. Subsequently, an ignition delay time sensitivity analysis was completed at higher and lower temperatures to determine reaction rate sensitivities. The results of the sensitivity analysis indicate that the ignition-enhancing reaction H + O2 = O + OH and hydrogen oxidation kinetics in general were most important regardless of mixture composition or temperature. However, lower-temperature ignition delay time results indicate additional influence from HO2- and CO- containing reactions. These reactions appear to be the cause of the dramatically longer ignition delay times at the lower temperatures.

Publication Date

1-1-2005

Publication Title

Fall Technical Meeting of the Western States Section of the Combustion Institute 2005, WSS/CI 2005 Fall Meeting

Volume

2

Number of Pages

1044-1052

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84947203934 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84947203934

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