基于不同注入策略的液体氨/二甲基乙烯双燃料喷雾燃烧特性研究
Jun Fu1,2,3, Han He1, Feibin Yan4
1College of Mechanical and Energy Engineering, Shaoyang University, Shaoyang, China.
PloS one
|September 22, 2025
概括
乙二甲基以太 (DME) 通过改善点火来增强液体氨的燃烧. 通过特定的注射器间距和氨能量份额,获得了最佳结果,这表明燃料利用率和燃烧效率有所改善.
科学领域:
- 燃烧科学是一种科学.
- 绿色燃料是一种绿色燃料.
- 计算流体动力学 计算流体动力学
背景情况:
- 氨是一种有前途的零碳燃料,但其反应性较低,导致点火和燃烧问题.
- 甲基乙醇 (DME) 具有高反应性和无烟尘的燃烧,使其成为氨的潜在添加剂.
- 优化氨和DME的共同燃烧需要了解它们在各种注射策略下的相互作用.
研究的目的:
- 为了研究液体氨和二甲基以太 (DME) 作为混合燃料的协同效应.
- 用计算模拟来确定用于增强氨-DME燃烧的最佳注入参数.
- 分析注入间距和氨的能量份额对燃烧特性的影响.
主要方法:
- 利用计算模拟来建模液体氨和DME的联合燃烧.
- 多样化的注射器间距 (6-8厘米) 和注射角度 (60°-180°).
- 评估不同的氨能份额 (例如70%),以评估燃烧性能.
主要成果:
- 在注射器间距为6厘米,注射角度为180°,氨能量占比为70%的情况下,观察到最佳的点火增强.
- 在DME燃烧过程中较短的间隔导致OH基的形成减少,但NH2的形成增加,这表明火焰的有效冷却和更高的氨燃料转化.
- 观察到双模醇NH2峰值,这与DME燃烧期间的火焰引起的氧化和随后的自燃相对应.
结论:
- 与单独使用氨相比,氨和DME的联合燃烧显著提高了点火和燃烧效率.
- 具体的注射参数,特别是注射器间距和氨能量份额,对于优化性能至关重要.
- 这项研究为控制这种绿色燃料混合物的燃烧动态提供了宝贵的见解.
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