一种减少顺序的伪通道模型,用于计算汽车催化剂的流量分布不当
Pratheeba Chanda Nagarajan1,2, Henrik Ström3, Jonas Sjöblom4
1Division of Energy Conversion and Propulsion Systems, Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, 41296, Sweden.
Scientific reports
|February 11, 2025
概括
一个新的伪通道模型通过准确计算流量分配不当,改善了废气后处理系统 (EATS) 的预测. 这种计算效率高的方法增强了用于实时应用的催化转换器建模.
科学领域:
- 汽车工程 汽车工程
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 排气后处理系统 (EATS) 对于减少排放和遵守法规至关重要.
- 催化转换器的准确建模需要复杂的短暂3D模拟,这在计算上是昂贵的.
- 现有的单通道模型 (SCM) 是高效的,但缺乏准确性,流量分布不当.
研究的目的:
- 为EATS开发一个计算效率高的伪通道模型.
- 为了提高催化转换器模拟的准确性,特别是在流量分布不良的条件下.
- 为了实现EATS的实时控制和诊断.
主要方法:
- 通过使用稳态反应式3D模拟,衍生出一个伪通道模型.
- 在模型开发中采用非线性最小平方优化技术.
- 在过渡和稳定状态测试情况下与传统单通道模型 (SCM) 验证了该模型.
主要成果:
- 拟议的伪通道模型与传统的SCM相比显示出更高的性能.
- 在过渡和稳定状态模拟场景中都观察到精度的提高.
- 伪通道模型的计算成本仍然相当于SCM的计算成本.
结论:
- 伪通道模型有效地将流量不当分配效应纳入计算效率高的SCM中.
- 这种方法为准确的实时EATS建模和诊断提供了可行的解决方案.
- 相对便宜的稳定状态系统数据可以用于先进的模型开发.
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