| 杜承泽,张佃浩,礼博,等.甲醇/柴油双直喷相对位置对燃烧及排放特性的影响[J].内燃机工程,2026,47(1):84-95. |
| 甲醇/柴油双直喷相对位置对燃烧及排放特性的影响 |
| Influences of the Relative Position of Methanol/Diesel Dual Direct Injection on Combustion and Emission Characteristics |
| DOI：10.13949/j.cnki.nrjgc.2026.01.009 |
| 关键词:柴油引燃 高压直喷 甲醇 双直喷 相对位置 燃烧特性 |
| Key Words:diesel ignition high-pressure direct injection methanol doubledirect injection relative position combustion characteristic |
| 基金项目:国家自然科学基金项目（52401373） |
|
| 摘要点击次数: 92 |
| 全文下载次数: 44 |
| 摘要:为研究柴油火焰和甲醇喷雾的相对位置对直喷柴油引燃高压直喷甲醇燃烧及排放特性的影响，基于CONVERGE软件建立了定容弹三维仿真模型，并验证了模型的准确性，以此展开研究。研究结果表明，甲醇晚于柴油喷射时呈现两阶段放热。甲醇喷雾和柴油火焰的接触位置为卷吸交汇区域时可实现快速引燃甲醇并且快速燃烧。柴油喷射器位于1 cm、甲醇喷射器位于4 cm的配置下，滞燃期和燃烧持续期最短，燃烧效率最高，排放水平最低。对各项排放物分布的研究结果表明，碳烟和CO的分布由甲醇燃烧状态主导，而NOx的分布则与柴油火焰温度场密切相关。 |
| Abstract:To study the influence of the relative position of diesel flame and methanol spray on the combustion and emission characteristics of high-pressure direct injection methanol ignited by direct injection diesel， a three-dimensional simulation model of constant volume bomb was established based on CONVERGE software， and the accuracy of the model was verified. Study results show that methanol exhibits two stages of exothermic when injected later than diesel. When the contact position between the methanol spray and the diesel flame is the area where the coil and suction meet， the methanol can be ignited and burned quickly. The configuration of the diesel injector at 1 cm and the methanol injector at 4 cm has the shortest lag period and combustion duration， the highest combustion efficiency and the lowest emission level. According to the study of the distribution of various emissions， it is found that the distribution of soot and CO is dominated by the combustion state of methanol， while the distribution of NOx is closely related to the temperature field of diesel flame. |
|
查看全文 HTML
查看/发表评论 下载PDF阅读器 |