Visualization of Flame Propagation in a Spark Ignition Engine with an Unscavenged Prechamber

• OHTSU Akihiko

• RYU Hano

• ASANUMA Tsuyoshi

抄録

To obtain a better understanding of the combustion process in a spark ignition engine with an unscavenged horizontal prechamber connected to a main chamber by a torch nozzle of various area sizes (An), the flame propagations in the pre- and main chambers are simultaneously visualized with high-speed photography under such operating conditions as the optimum spark advance for best torque (MBT), volumetric efficiency ηυ=80±2%, air-fuel ratio of A/F<bsime>15 and engine speed of N <bsime>1000 rpm. The torch flame patterns in the main chamber are found to correspond fairly well with those of heat release rates computed from the ensemble-averaged pressure diagrams. On the basis of those flame photographs, several combustion characteristics, namely, the apparent flame speed, timing of actual ignition, ejected timing of torch flame and timing of combustion finish and combustion area fraction are also examined for each torch nozzle with different areas and an open chamber. In addition, the correlations between the above combustion characteristics and the engine performances are discussed.

収録刊行物

• JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

  JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 32 (1), 127-133, 1989

  一般社団法人 日本機械学会

キーワード

• Visualization
• High-speed Photography
• Flame Propagation
• Combustion Process
• Combustion Characteristics
• Spark Ignition Engine with Prechamber

詳細情報

• CRID: 1390282680403420288
• NII論文ID: 110002494245
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.32.1_127
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/32/1/32_1_127/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可