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

Optical diagnostics of nanosecond and nanometer ignition and quenching

Research Project

Project/Area Number 16360105
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionOkayama University

Principal Investigator

TOMITA Eiji  Okayama University, Graduate School of Natural Science & Technology, Professor, 大学院・自然科学研究科, 教授 (80155556)

Co-Investigator(Kenkyū-buntansha) KAWAHARA Nobuyuki  Okayama University, Graduate School of Natural Science & Technology, Assistant Professor, 大学院・自然科学研究科, 助教授 (30314652)
IKEDA Yuji  Okayama University, Imagineering, Inc., President(Researcher), 代表取締役(研究職) (10212789)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2004: ¥11,100,000 (Direct Cost: ¥11,100,000)
KeywordsLaser ignition / Laser-induced plasma / Spectroscopy / Laminar premixed flame / Emission spectra
Research Abstract

In order to obtain basic data for analysis of ignition mechanism, chemiluminescence was measured at the flame front and the anchor point of laminar premixed CH_4/air and C_3H_8/air flames. Using the chemiluminescence spectra, anchor point location, local equivalence ratio, and flame temperature were examined. The local equivalence ratio was measured using the intensity ratio of OH^* and CH^* and the temperature were using measured the intensity ratio of the P and the R branches of the OH^* spectra. The local equivalence ratio and the temperature were lower near the anchor point.
When a powerful pulsed laser is focused to a small spot in gas, breakdown phenomena occurs and a spark plasma of high temperature and high pressure is created. If the laser beam interacts with a combustible gas, the plasma can ignite the gas. The emission spectra of the plasma were obtained by ICCD spectrometer and were captured using Framing ICCD camera. From these results, the following conclusions are obtained. (1)The shape of plasma turns out to be cylindrical at first. After that, the plasma expands spherically. The plasma size increases until 2000ns, after that time it was decreases rapidly. (2)The continuum spectrum by the bremsstrahlug and the recombination radiation came up at the earliest stage of the plasma development. Then the continuum spectrum decreased, the ionic spectra and the atomic spectra of hydrogen, nitrogen, oxygen, and carbon observed. (3)The plasma size was a correlated with the incident laser energy. The intensity ratios of H/O and H/N were found to be a liner function of equivalence ratio of the mixture. These results demonstrated that LIBS application can measure the local equivalence ratio of methane or propane premixed laminar flame.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (18 results)

All 2006 2005 2004

All Journal Article (18 results)

  • [Journal Article] Spatial and Temporal Characteristics of Laser-induced Air Plasma2006

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama, Yuji Ikeda, Atsushi Nishiyama
    • Journal Title

      44th AiAA Aerospace Sciences Meeting and Exhibit 2006-1461

      Pages: 1-12

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Local equivalence ratio measurement of CH4/Air and C3H8/Air laminar Flames by Laser-Induced Breakdown Spectroscopy2006

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama
    • Journal Title

      44th AiAA Aerospace Sciences Meeting and Exhibit 2006-1465

      Pages: 1-9

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spatial and Temporal Characteristics of Laser-induced Air Plasma2006

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama, Yuji Ikeda, Atsushi Nishiyama
    • Journal Title

      44th AIAA Aerospace Sciences Meeting and Exhibit No.2006-1461

      Pages: 1-12

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Local equivalence ratio measurement of CH4/Air and C3H8/Air laminar flames by Laser-Induced Breakdown Spectroscopy2006

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama
    • Journal Title

      44th AIAA Aerospace Sciences Meeting and Exhibit No.2006-0965

      Pages: 1-9

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Spatial and Temporal Characteristics of Laser-induced Air Plasma2006

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita Takashi Nakayama, Yuji Ikeda, Atsushi Nishiyama
    • Journal Title

      44th AIAA Aerospace Sciences Meeting and Exhibit 2006-1461

      Pages: 1-12

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Local equivalence ratio measurement of CH4/Air and C3H8/Air laminar flames by Laser-Induced Breakdown Spectroscopy2006

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama
    • Journal Title

      44th AIAA Aerospace Sciences Meeting and Exhibit 2006-0965

      Pages: 1-9

    • Related Report
      2005 Annual Research Report
  • [Journal Article] In-spark-plug Sensor for analyzing the Initial Flame and Its Structure in an SI Engine2005

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, shigeyuki Arimoto, Akira takeuchi
    • Journal Title

      SAR World Congress 2005-01-0644

      Pages: 1-9

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Measurement of Flame Propagation Characteristics in an SI Engine Using Micro-Local Chemiluminescence Technique2005

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Akira Takeuchi, Shigeyuki Arimoto, Yuji Ikeda, Atsushi Nishiyama
    • Journal Title

      SAR World Congress 2005-01-0645

      Pages: 1-9

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Highly spatially resolved time evolution of laser-induced air plasma spectrum2005

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Takashi Nakamura, Atsushi Nishiyama, Yuji Ikeda, Takahiro Kurahashi
    • Journal Title

      Pacifichem 2005 871(CD-Rom)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Local stoichiometry measurement of CH4/Air and C3H8/Air laminar flames by LIBS2005

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takahiro Kurahashi
    • Journal Title

      Pacifichem 2005 871(CD-Rom)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] In-spark-plug Sensor for Analyzing the Initial Flame and Its Structure in an SI Engine2005

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Shigeyuki Arimoto, Akira Takeuchi
    • Journal Title

      SAE World Congress 2005-01-0644

      Pages: 1-9

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Measurement of Flame Propagation Characteristics in an SI Engine Using Micro-Local Chemiluminescence Technique2005

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Akira Takeuchi, Shigeyuki Arimoto, Yuji Ikeda, Atsushi Nishiyama
    • Journal Title

      SAE World Congress 2005-01-0645

      Pages: 1-9

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Highly spatially resolved time evolution of laser-induced air plasma spectrum2005

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama, Atsushi Nishiyama, Yuji Ikeda, Takahiro Kurahashi
    • Journal Title

      Pacifichem 2005 No.871(CD-Rom)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Local stoichiometry measurement of CH4/Air and C3H8/Air laminar flames by LIBS2005

    • Author(s)
      Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takahiro Kurahashi
    • Journal Title

      Pacifichem 2005 No.871(CD-Rom)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Highly spatially resolved time evolution of laser-induced air plasma spectrum2005

    • Author(s)
      Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama, Atsushi Nishiyama, Yuji Ikeda, Takahiro Kurahashi
    • Journal Title

      Pacifichem 2005 868(CD-Rom)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spark plug-in Sensor for Flame Kernel Development and Its Flame Front Structure in an SI Engine2005

    • Author(s)
      Ikeda, Y., Nishiyama, A., Kawahara, N., Tomita, E., Arimoto, S., Takeuchi, A.
    • Journal Title

      SAB Paper, Paper No.2005-01-0644

      Pages: 1-9

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Measurement of Flame Propagation Characteristics in an SI Engine Using Micro-Local Chemiluminescence Technique2005

    • Author(s)
      Kawahara, N., Tomita, E., Takeuchi, A., Arimoto, S., Ikeda, Y., Nishiyama, A.
    • Journal Title

      SAE Paper Paper No.2005-01-0645

      Pages: 1-9

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Time-series A/F Analysis in a SI Engine by Micro-Local Chemiluminescence Technique2004

    • Author(s)
      Ikeda, Y., Kawahara, N., Tomita, E.
    • Journal Title

      COMODIA2004

      Pages: 1-7

    • Related Report
      2004 Annual Research Report

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi