The Oxidation of Propane at Elevated Pressures in a Rapid-Compression Machine - An Experimental and Modeling Study

摘要

Ignition delay times have been recorded in a rapid compression machine (RCM) for various propane/air mixtures within the temperature range 700-1,100 K, and compressed gas pressures of 20, 30 and 40 bar. Within this range a negative temperature coefficient (NTC) regime was observed. However, a two-stage ignition, typical of other larger hydrocarbon fuels, did not feature. A propane model is presented, validated against high temperature data of Kim and Shin [1] and low temperature data of Koert et al. [2] measured in a flow reactor. The model was then combined with heat losses, characteristic of the relatively long delay times of the RCM, to predict the compression stroke and ignition delay time of propane under stoichiometric conditions and at a compressed-gas pressure of 30 bar.