論文

査読有り
2019年

Differences between PREMIER combustion in a natural gas spark-ignition engine and knocking with pressure oscillations

Proceedings of the Combustion Institute
  • Nobuyuki Kawahara
  • ,
  • Yungjin Kim
  • ,
  • Hisashi Wadahama
  • ,
  • Kazuya Tsuboi
  • ,
  • Eiji Tomita

37
4
開始ページ
4983
終了ページ
4991
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.proci.2018.08.055
出版者・発行元
ELSEVIER SCIENCE INC

PREMIER (PREmixed Mixture Ignition in the End-gas Region) combustion occurs with auto-ignition in the end-gas region when the main combustion flame propagation is nearly finished. Auto-ignition is triggered by the increases in pressure and temperature induced by the main combustion flame. Similarly to engine knocking, heat is released in two stages when engines undergo this type of combustion. This pattern of heat release does not occur during normal combustion. However, engine knocking induces pressure oscillations that cause fatal damage to engines, whereas PREMIER combustion does not. The purpose of this study was to elucidate PREMIER combustion in natural gas spark-ignition engines, and differentiate the causes of knocking and PREMIER combustion. We applied combustion visualization and in-cylinder pressure analysis using a compression-expansion machine (CEM) to investigate the auto-ignition characteristics in the end-gas region of a natural gas spark-ignition engine. We occasionally observed knocking accompanied by pressure oscillations under the spark timings and initial gas conditions used to generate PREMIER combustion. No pressure oscillations were observed during normal and PREMIER combustion. Auto-ignition in the end-gas region was found to induce a secondary increase in pressure before the combustion flame reached the cylinder wall, during both knocking and PREMIER combustion. The auto-ignited flame area spread faster during knocking than during PREMIER combustion. This caused a sudden pressure difference and imbalance between the flame propagation region and the end-gas region, followed by a pressure oscillation. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.proci.2018.08.055
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000457095600075&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.proci.2018.08.055
  • ISSN : 1540-7489
  • eISSN : 1873-2704
  • Web of Science ID : WOS:000457095600075

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