• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1998 Fiscal Year Final Research Report Summary

Interference Between Cnstituents in Spontaneous Ignition and Flame Propagation of Hydrocarbons

Research Project

Project/Area Number 09650239
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

ISHIYAMA Takuji  KYOTO UNIVERSITY,Faculuty of Energy Science, Associate Professor, エネルギー科学研究科, 助教授 (30203037)

Co-Investigator(Kenkyū-buntansha) MIWA Kei  Tokushima University, Graduate School of Engineers, 工学研究科, 教授 (00026147)
IKEGAMI Makoto  KYOTO UNIVERSITY,Faculty of Energy Science, Professor, エネルギー科学研究科, 教授 (70025914)
Project Period (FY) 1997 – 1998
KeywordsInternal Combustion Engines / Fuel / Hydrocarbons / Oxidation Process / Spontaneous Ignition / Flame Propagation
Research Abstract

The purpose of this study is to clarify fuel effects on spray ignition and ignition of premixture with attention to interference between constituents in fuels. First the change of fuel during its ignition process was investigated in chemical aspects using a gas sampling technique in a rapid compression machine and a flow reactor. The results show that the fuel breaks down to small hydrocarbons before rapid and large amount heat release begins due to temperature increase by heat supplied from adjacent initially oxidized mixture. The production rate of intermediate chemical species including the small hydrocarbons affects the ignition delay of a fuel spray.
Secondly the relation between fuel-air mixing and fuel effect was discussed based on the results obtained by using a newly constructed constant volume vessel equipped with a high-pressure fuel injection system. Ignition delays and courses of pressure during ignition process were measured and examined at the injection pressure of 80-160MPa and with the nozzle hole diameter of 0.14-0.22mm. The results reveal that the fuel effect on ignition delay diminishes at the high-pressure injection case with small nozzle holes. The effect was observed only in the case of low ambient pressure in which the fuel oxidation speed is slower. It is supposed that fast temperature increase in local mixtures shortens the time necessary for accumulating small hydrocarbons due to rapid fuel-air mixing. In a certain rage of ambient temperature, straight chain saturated hydrocarbons are dominant sources to generate intermediate species, while aromatic hydrocarbons in fuels act as inactive species before ignition. This is the reason why the ignition is delayed when aromatics are added into fuels. Dependency of nominal activation energy on temperature is influenced not only by fuel composition but also by fuel-air mixing rate.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 石山拓二: "希薄燃焼火花点火機関における排気特性への燃料影響" 第14回内燃機関シンポジウム講演論文集. 313-318 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石山拓二: "天然ガスデュアルフュエル機関の燃焼特性" 日本機械学会講演論文集. No.984-1. 2-23-2-24 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三輪 惠: "流動反応装置による炭化水素燃料の熱分解・酸化過程に関する研究" 日本機械学会講演論文集. No.985-1. 167-168 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 池上 詢: "天然ガスデュアルフュエル機関の排気特性" 日本機械学会講演論文集. No.994-1. 2-3-2-4 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ishiyama, T.: "Fuel Effects on Exhaust Emissions in Lean-burning Spark-ignited Engines" Proc.14th Symp.of Internal Combustion Engines. 313-318 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ishiyama, T.: "Combustion Characteristics of A Natural Gas Fuelled Dual Fuel Engines" Prepr.of Jpn.Soc.Mech.Eng.984-1. 2-23-2-24 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Miwa, K.: "Study on Thermal Cracking and Oxidation Process of Hydrocarbon Fuels in Flow Reactor" Prepr.of Jpn.Soc.Mech.Eng.985-1. 167-168 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikegami, M.: "Exhaust Characteristics of A Natural Gas Fuelled Dual Fuel Engines" Prepr.of Jpn.Soc.Mech.Eng.994-1. 2-3-2-4 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-12-08  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi