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对具有高混合率的航空生物燃料的原子化性能进行数值研究

Yanyu Cui¹, Changhong Xiong¹, Shugang Yang²

¹Civil Aviation University of China, Dongli District, Tianjin, China.

|May 6, 2025

概括

航空生物燃料混合物冲击引擎原子化. 较高的压力提高性能,而高生物燃料混合物 (≥50%) 在低压下降低效率,但在高压下变得不那么重要.

科学领域:

* 航空航天工程航空航天工程
* 燃烧科学燃烧科学
* 流体动力学流体动力学

背景情况:

*将航空生物燃料与传统飞机燃料混合,可以减少碳排放.
*高的生物燃料混合比率 (≥50%) 可能会对发动机原子化产生负面影响.
*了解原子化性能对于可持续的航空燃料至关重要.

研究的目的:

* 评估与喷气式飞机燃料混合的航空生物燃料的原子化性能.
* 调查混合比率,压力和温度对原子化的影响.
* 为优化航空中的生物燃料利用提供见解.

主要方法:

*使用流体体积 (VOF) 方法进行三维气液流量模拟.
* 在各种混合比率 (0-100%) 中对离心喷嘴原子化的分析.
* 在不同输入压力 (0.21.0 MPa) 和温度 (050°C) 下进行模拟.

主要成果:

*模拟结果显示与实证数据的偏差不到10%.
* 增加的进气压通过增加速度和减少液体薄膜厚度来增强原子化.
*高混合率 (≥50%) 在低压下降低了原子化效率,但在高压下影响最小.
*较高的温度会降低液体薄膜厚度,对高混合燃料的影响更为明显.

结论:

*入口压力是克服高生物燃料混合物的原子化挑战的关键因素.
*燃料温度显著影响原子化,特别是在高生物燃料含量燃料中.
*优化运行条件可以减轻高生物燃料混合率对原子化的负面影响.

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