骨架CH3OH/NO用于模拟火花点火和流喷气点火发动机的动力模型
Wenxian Tang1, Mickael Silva1, Khaiyom Hakimov1
1King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
ACS omega
|March 18, 2024
概括
开发甲醇和氧化 (NOx) 燃烧的骨运动模型可以提高发动机效率并减少排放. 该模型在模拟中准确预测甲醇-NOx相互作用,提高发动机性能.
科学领域:
- 燃烧化学 燃烧化学是什么
- 化学动力学 化学动力学
- 发动机燃烧发动机的燃烧方式
背景情况:
- 甲醇是提高发动机效率和降低排放量的关键可再生燃料.
- 氧化 (NOx) 在废气循环条件下显著影响甲醇氧化和点火.
- 缺乏骨运动模型阻碍了甲醇/NOx相互作用的精确计算流体动力学 (CFD) 模拟.
研究的目的:
- 为甲醇 (CH3OH) 和氧化 (NOx) 相互作用开发一个缩小的骨运动模型.
- 用新的实验数据和现有文献验证模型.
- 将模型应用于火花点火 (SI) 和流喷气点火 (TJI) 发动机的3D CFD模拟中.
主要方法:
- 开发了一种骨运动模型,包括25个物种和82个反应 (55个不可逆转,27个可逆转).
- 在20-30bar和850-950K的快速压缩机 (RCM) 中,用200ppmv的NO/NO2对甲醇进行实验性点火研究.
- 与文献数据的验证以及在各种条件下新的实验结果.
- 在SI和TJI发动机燃烧3DCFD模拟中的应用.
主要成果:
- 实验数据显示,NO/NO2显著增强了甲醇点火.
- 提出的骨机制准确地预测了甲醇和甲醇/NOx燃烧在广泛的条件.
- 使用骨架机制的CFD模拟与SI和TJI发动机的实验压力痕迹和发动机指标有很好的一致性.
结论:
- 开发的骨运动模型适合并足以用于CFD模拟使用NOx燃烧甲醇的模型.
- 对CH3OH/NOx相互作用的准确建模对于预测发动机燃烧性能至关重要.
- 该模型有助于优化可再生燃料的燃烧,以提高效率和减少排放.
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