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This study investigates flame zone characteristics within a vehicle engine compartment, focusing on the influence of inflow velocity, pan diameter, and initial fuel thickness. The research employs heptane as fuel and an engine cooling fan to generate different ventilation conditions. Heat release rate, temperature profiles, and flame zone analysis using McCaffrey criteria are presented. The results show that, despite the rise in heat release rate with increasing initial fuel thickness and inflow velocity, their impact on the temperature in the continuous flame zone is negligible, while pan diameter influences the temperature in this zone. The \(B_{\eta }\) coefficient values in the intermittent zone consistently fall below the \(B_{\eta }\) coefficient in McCaffrey’s work.

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Ventilation Effects on Flame Zone Characteristics in a Vehicle Engine Compartment

  • 会议论文

  • 发表日期：

    2026年

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  • Soleh F. Junjunan,
  • Khaled Chetehouna,
  • Ilyas Sellami,
  • Yulianto S. Nugroho,
  • Antoine Oger

摘要

This study investigates flame zone characteristics within a vehicle engine compartment, focusing on the influence of inflow velocity, pan diameter, and initial fuel thickness. The research employs heptane as fuel and an engine cooling fan to generate different ventilation conditions. Heat release rate, temperature profiles, and flame zone analysis using McCaffrey criteria are presented. The results show that, despite the rise in heat release rate with increasing initial fuel thickness and inflow velocity, their impact on the temperature in the continuous flame zone is negligible, while pan diameter influences the temperature in this zone. The \(B_{\eta }\) coefficient values in the intermittent zone consistently fall below the \(B_{\eta }\) coefficient in McCaffrey’s work.