期刊
PROCEEDINGS OF THE COMBUSTION INSTITUTE
卷 35, 期 -, 页码 2933-2940出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.proci.2014.06.070
关键词
Kinetic modelling; Engine autoignition; Liquefied Petroleum Gas; LPG; GT-Power
资金
- Advanced Centre for Automotive Research and Testing (ACART)
- Australian Research Council
This paper investigates the autoignition of C-3/C-4 hydrocarbon mixtures in a CFR octane rating engine. The four species examined - propane, propylene (propene), n-butane and iso-butane - are the primary constituents of Liquefied Petroleum Gas (LPG), and are also important intermediates in the oxidation of larger hydrocarbons. In-cylinder pressure data was acquired for both autoigniting and non-autoigniting engine operation at the same test conditions. The latter was used to calibrate a two-zone model of the CFR engine in a prior work, thus enabling the inclusion of the unburned charge chemical kinetics for further examination in this paper. The in-cylinder heat transfer and residual gas composition are both shown to affect autoignition significantly. In particular, physically reasonable concentrations of nitric oxide (NO) are found to be a strong promoter of autoignition in almost all cases, in keeping with several, more fundamental studies. The inclusion of NO in the residual gas is also required to obtain good agreement between the measured and modelled autoignition timing. This in turn suggests that kinetic interaction between hydrocarbon fuels and NO plays a vital role in octane rating, and its inclusion is important when modelling the autoignition of hydrocarbons in spark-ignition engines more generally. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据