G071022 急速圧縮膨張装置を用いた天然ガスデュアルフュエル燃焼の解析([G071-02]エンジンシステム部門,一般セッション(2))

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タイトル別名
  • G071022 Analysis of Combustion Process in a DDF Engine Using a Rapid Compression/Expansion Machine

抄録

Combustion of diesel dual fuel (DDF) was investigated using a rapid compression/expansion machine (RCEM). Ignition and spreading of burnt gas region were visualized by a high-speed color digital camera. According to the visualized images, auto-ignition occurs in the pilot-spray with a part of natural gas mixture, then the burnt gas, which is observed as a bright white region, spreads out. In the latter period of the combustion, a dark region, which corresponds to a hydrocarbon emission, still remains between the sprays. For a case of early injection, the burnt gas quickly moves out from a piston bowl to a squish area, so that the natural gas mixture in the center of the bowl does not burn completely. For a case of two-stage injection, injected fuel of the first part diffuses into the natural gas mixture and the combustion.

収録刊行物

  • 年次大会

    年次大会 2013 (0), _G071022-1-_G071022-5, 2013

    一般社団法人 日本機械学会

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