Influence of tumble and unsteady effects on near-wall heat transfer in SI engine

Ryosuke Okutani, Takeshi Yokomori, Masayoshi Matsuda, Hidetsugu Yamamoto, Norimasa Iida, Daijiro Ishii, Yuji Mihara

研究成果: Paper査読

1 被引用数 (Scopus)

抄録

Recently, elucidation of the near-wall heat transfer is strongly required for enhancing engine thermal efficiency. However, the previous wall heat flux models assuming the wall-function do not have enough prediction accuracy as for the recent engine technical development. This study focused on the influence of tumble and unsteady effects as the error factor and investigated them on the near-wall heat transfer in recent high compression ratio and high tumble SI (spark ignition) engine. In this paper, the measurements of heat flux and flow distribution in an optical SI engine, three kinds of 1-D calculation and estimation related to heat flux with previous models were performed. Finally, it is shown that four mechanisms regarding tumble and unsteady effects cause the previous models underestimation.

本文言語English
出版ステータスPublished - 2017
イベント11th Asia-Pacific Conference on Combustion, ASPACC 2017 - Sydney, Australia
継続期間: 2017 12月 102017 12月 14

Other

Other11th Asia-Pacific Conference on Combustion, ASPACC 2017
国/地域Australia
CitySydney
Period17/12/1017/12/14

ASJC Scopus subject areas

  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 燃料技術
  • 化学工学(全般)

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