在柴油燃烧过程中离子形成的动力建模,不同的燃料注入时间不同
Elaheh Neshat1, Milad Mohammadi1
1Faculty of Mechanical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran.
Heliyon
|April 15, 2024
概括
这项研究研究了柴油发动机中的离子形成,发现延迟燃料注入时间延迟了离子生成. 内离子电流准确地预测了燃烧的开始.
科学领域:
- 燃烧科学 燃烧科学
- 化学动力学 化学动力学
- 发动机技术 发动机技术 技术
背景情况:
- 离子形成是内燃机过程的一个关键方面.
- 测量气内的离子为燃烧行为提供了宝贵的见解.
- 柴油发动机的性能和排放受到燃烧动态的影响.
研究的目的:
- 研究燃料注射时间的变化对柴油发动机中圆柱体内离子形成的影响.
- 在燃烧周期期间模拟离子的动态行为.
- 为了确定离子电流和燃烧开始之间的关系.
主要方法:
- 利用多区热力学模型来模拟发动机的闭环.
- 集成了一个离子化学动力学机制 (336个反应,81种) 来分析离子行为.
- 使用Dvode微分方程解法器进行能量和动力学计算.
主要成果:
- 燃料注入时间延迟导致燃烧室内的离子形成延迟.
- 发现,筒内离子的最大度取决于注射时间.
- 内离子电流与燃烧启动的准确预测有很强的相关性.
结论:
- 燃料注入时间是影响柴油发动机离子形成动力学的关键参数.
- 内离子电流作为监测和预测燃烧开始的可靠指标.
- 开发的模型为预测柴油发动机性能和污染物形成提供了可接受的准确性.
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