A comprehensive experimental and simulation study of ignition delay time characteristics of single fuel C1–C2 hydrocarbons over a wide range of temperatures, pressures, equivalence ratios, and dilutions

Abstract

A comprehensive experimental and modeling study of the ignition delay time (IDT) characteristics of some single prominent C1–C2 hydrocarbons including methane, ethane, and ethylene has been performed over a wide range of temperatures (∼800–2000 K), pressures (∼1–80 bar), equivalence ratios (∼0.5–2.0), and dilutions (∼75–90%). An extensive literature review was conducted, and available data were extracted to create a comprehensive database used in our simulations. Based on existing literature data, an experimental matrix was designed using the Taguchi approach (L9) in order to identify and complete the experimental matrix required to generate a comprehensive validation set necessary for validation of a chemical kinetic model. The required IDTs were recorded using a high-pressure shock tube for shorter IDTs and a rapid compression machine for longer times, which encompass high- and low-temperature ranges, respectively. The predictions of a C3-NUIG mechanism have been compared with all of the available experimental data including those from the current study using the IDT simulations and the correlation technique. Moreover, individual and total effects of the studied parameters including pressure, equivalence ratio, and dilutions on IDT have been studied over a wide temperature range. Moreover, correlations which were developed based on the NUIG mechanism are presented for each specific fuel over the conditions studied. These correlations show acceptable performance versus the experimental Taguchi matrix data.