Detection of Transient Species in Ignition Process by using Sensitive and Fast Sampling Method

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560226
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: University of Toyama
• Principal Investigator: TEZAKI Atsumu 富山大学, 大学院理工学研究部(工学), 教授 (50236965)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 燃焼 / 着火 / 反応機構 / 成分計測 / 質量分析 / 内燃機関

Outline of Final Research Achievements

A crank angle resolved gas sampling method has been developed in order to detect intermediate species produced during processes of compression ignition, as well as the two-step consumption of fuel components. The direct mass-spectrometric detection through the differential pumping system enabled to observe unstable and low vapor pressure species such as hydrogen peroxide. It was found that toluene has a non-linear effect to lower the ignitability of n-heptane in terms of mixing ratio, while the iso-octane effect is linear. This difference is accounted for by the chain reaction mechanism of low temperature oxidation, in which toluene has lower rate constant with OH and lower OH reproduction index than iso-octane.

Free Research Field

熱工学