模拟具有丰富振动激发状态的等离子体辅助点火的三T方法
Yifan Qiu1, Yifei Zhu1, Zexing Qu2
1National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an 710049, China.
The journal of physical chemistry. A
|August 6, 2025
概括
一个新的三温度模型 (Triple-T) 通过引入"反应温度"来计算振动状态,从而增强了等离子体燃料化学模拟. 这种方法降低了计算成本,并提高了复杂反应系统的准确性.
科学领域:
- 等离子体化学
- 燃烧科学 燃烧科学
- 化学动力学 化学动力学
背景情况:
- 振动激发物种在燃料等离子系统中显著影响气体温度和反应速率.
- 经典的两温度模型与弗里德曼-马切雷特α模型被广泛使用,但需要详细的基本反应速率.
- 现有的模型面临着高维度,计算成本和精度的挑战,原因是大量的振动反应和滥用整体速率.
研究的目的:
- 提出一种新的三温度模型 (Triple-T模型) 作为复杂等离子体-燃料化学模型的替代方案.
- 引入"反应温度" (Treact),以更好地代表振动激发状态在高维模型中的影响.
- 评估模型在模拟等离子体辅助点火场景中的有效性.
主要方法:
- 开发和实施一个包含新的"反应温度" (Treact) 的三温 (Triple-T) 模型.
- 应用三T模型来模拟NH3/O2/N2,CH4/O2/He和H2/O2/He混合物的等离子体辅助点火.
- 与经典模型进行比较,以评估计算成本和精度改进.
主要成果:
- 三重T模型成功地模拟了三种经典气体混合物的等离子体辅助点火.
- 实现了原始化学集大小的显著减少:NH3/O2/N2的46%,CH4/O2/He的33%,H2/O2/He的7%.
- 该模型允许研究振动状态对能量分割和点火延迟时间的影响.
结论:
- 拟议的三T模型为复杂的等离子体燃料化学模拟提供了一种可行和更有效的方法.
- "反应温度"的引入有效地捕捉了振动激发的影响,提高了模型的准确性并减少了计算负担.
- 这个模型提供了对等离子体增强燃烧中的能量动态和点火过程的宝贵见解.
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