| 基于详细化学反应机理的DME发动机三维湍流燃烧模拟 |
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| 引用本文： | 莫春兰,张煜盛,张辉亚,徐波.基于详细化学反应机理的DME发动机三维湍流燃烧模拟[J].工程热物理学报,2007,28(3):525-527. |
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| 作者姓名： | 莫春兰 张煜盛 张辉亚 徐波 |
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| 作者单位： | 1. 华中科技大学能源与动力工程学院,湖北,武汉,430074;广西大学,广西,南宁,530004
2. 华中科技大学能源与动力工程学院,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 采用基于详细化学反应机理的三维湍流燃烧数值模拟,研究直喷柴油机燃用二甲基醚(DME)的伴有化学反应的流动燃烧现象.模拟预测的缸内压力随曲轴转角的变化及NO排放浓度与实验相符.分析了计算所得的曲轴转角随缸内流场速度、温度和组分浓度的分布历程,结果表明甲醛在低中温下相对稳定,随着温度的升高,氧化反应加速进行,而由于流动及壁面传热等效应,甲醛作为不完全燃烧产物存在于排气中.
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| 关 键 词： | 二甲基醚 详细化学反应机理 燃烧 排放物生成 |
| 文章编号： | 0253-231X(2007)03-0525-03 |
| 修稿时间： | 2006年12月7日 |
THREE-DIMENSIONAL COMBUSTION SIMULATION ON DME ENGINE BASED ON DETAIL CHEMICAL-KINETIC MECHANISM |
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| MO Chun-Lan,ZHANG Yu-Sheng,ZHANG Hui-Ya,XU Bo.THREE-DIMENSIONAL COMBUSTION SIMULATION ON DME ENGINE BASED ON DETAIL CHEMICAL-KINETIC MECHANISM[J].Journal of Engineering Thermophysics,2007,28(3):525-527. |
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| Authors: | MO Chun-Lan ZHANG Yu-Sheng ZHANG Hui-Ya XU Bo |
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| Abstract: | In this paper,simulation took into account the influence of turbulence on combustion by using KIVA program coupled with Partially Stirred Reactor model based on detail chemical-kinetic mechanism.The calculation results of in-cylinder pressure and oxides of nitrogen agree well with those of experiments.Through analyzing in-cylinder flow velocity,temperature and species concentration changed with the crank angle in calculation,the results indicate that formaldehyde is relative stable in low and medium temperature condition,then accelerate oxidation with increasing in-cylinder temper- ature,but due to wall transfer and flow and local poor oxygen caused by combustion,there are higher concentration emissions of partial oxidation products of formaldehyde. |
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| Keywords: | dimethyl ether detail chemical-kinetic mechanism combustion emission formation |
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