分会场

高效清洁燃烧

摘要

Improving the efficiency of internal combustion engines is important for reducing global greenhouse gas emissions; the efficiency of spark ignition (SI) engines is limited by the knock phenomenon. As opposed to naturally aspirated engines, turbocharged engines operate at beyond-RON conditions, and fuel octane sensitivity (OS=RON-MON) becomes important under such conditions. Previous work by this group [Singh et al., Energy and Fuels, 2017] demonstrated the chemical kinetic origins of octane sensitivity; this study is extended to provide a qualitative--as well as quantitative--definition of octane sensitivity, based on fundamental ignition markers. A varying amount of toluene is blended with various primary reference fuels to match the ignition delay of the targeted research octane number fuels, allowing a range of octane sensitivities for each research octane number. This study establishes a correlation between octane sensitivity and heat release rates at low, intermediate, and high temperatures.

关键词

fuels

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