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Numerical analysis on knock for a high compression ratio spark-ignition methanol engine

机译:高压缩比火花点火甲醇发动机爆震的数值分析

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摘要

Methanol is an alternative, renewable, environmentally and economically attractive fuel. It is considered to be one of the most favorable fuels for internal combustion engines. In this paper, knock in a high compression ratio spark-ignition methanol engine was modeled and investigated using FIRE Code CFD (Computational Fluid Dynamics) calculations. Knocking combustion was simulated under different operating conditions. Finally, the effects of spark timing and EGR (Exhaust Gas Recirculation) techniques for suppressing knock in a high compression ratio spark-ignition methanol engine were studied based on the numerical analysis through the analysis of the thermal efficiency. The results showed that with the increase of the EGR, the thermal efficiency was greatly reduced and the knock occurrence timing was postponed. The use of a high EGR rate and early spark timing had a better thermal efficiency on the knock suppression as compared to the use of a low EGR rate and late spark timing.
机译:甲醇是一种可替代的,可再生的,对环境和经济具有吸引力的燃料。它被认为是用于内燃机的最有利的燃料之一。在本文中,对高压缩比火花点火甲醇发动机的爆震进行了建模,并使用FIRE Code CFD(计算流体动力学)计算进行了研究。在不同工况下模拟爆燃。最后,通过对热效率的分析,在数值分析的基础上,研究了火花正时和EGR技术对抑制高压缩比火花点火甲醇发动机爆震的影响。结果表明,随着EGR的增加,热效率大大降低,爆震发生时间被推迟。与使用低EGR率和较晚火花正时相比,高EGR率和较早火花正时的使用在爆震抑制方面具有更好的热效率。

著录项

  • 来源
    《Fuel》 |2013年第1期|892-898|共7页
  • 作者单位

    State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;

    State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;

    State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;

    State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    methanol; spark ignition engine; knock; numerical analysis; EGR;

    机译:甲醇火花点火发动机;敲;数值分析;废气再循环;

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