A reduced Ammonia/China Stage-VI diesel mechanism for dual-fuel engine simulations: Development, validation and CFD implementation

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-06-07 DOI:10.1016/j.ijhydene.2025.05.338

Liping Yang , Rui Wang , Feng Jiang , Liang Guo , Sifan Li , Jiqiang Zhang

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引用次数: 0

Abstract

Ammonia (NH₃) is a hydrogen energy carrier, and NH₃/diesel dual-fuel engines enhance NH₃ flame propagation and combustion stability while reducing emissions. A reduced NH₃/diesel mechanism is crucial for dual-fuel engine combustion simulation. However, previous studies using Non-dominated Sorting Genetic Algorithm II (NSGA-II) with manual selection were affected by decision-maker subjectivity. In this study, the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was used to improve decision consistency, repeatability, and explain-ability. A novel NSGA-II/TOPSIS hybrid method was first used to develop a reduced mechanism for China Stage-VI diesel under wide engine conditions. Sensitivity analysis was used to identify the key NH₃/diesel auto-ignition reactions. Validated against experimental data, the optimized mechanism (90 species, 400 reactions) achieved an average of 12 % higher accuracy in predicting NH₃/China Stage-VI diesel blends ignition delay times across all tested ammonia energy ratios (10–90 %) compared to detailed mechanisms, and successfully simulated real engine combustion conditions.

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用于双燃料发动机模拟的简化氨/中国Stage-VI柴油机制：开发、验证和CFD实施

氨（NH3）是氢能量载体，NH3/柴油双燃料发动机增强了NH3火焰的传播和燃烧稳定性，同时减少了排放。减少NH3/柴油机制是双燃料发动机燃烧模拟的关键。然而，以往使用非支配排序遗传算法II （NSGA-II）进行人工选择的研究受到决策者主观性的影响。在本研究中，运用理想解相似性排序偏好技术（TOPSIS）来提高决策一致性、可重复性和可解释性。一种新颖的NSGA-II/TOPSIS混合方法首次用于开发中国六期柴油在宽发动机条件下的简化机构。采用敏感性分析方法对关键的NH3/柴油自燃反应进行了识别。通过实验数据验证，优化机制（90种反应，400种反应）在所有测试氨能比（10 - 90%）下预测NH3/中国ⅵ期柴油混合物点火延迟时间的准确率比详细机制平均提高了12%，并成功模拟了真实发动机燃烧条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.