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| 生物柴油掺氨对均质压燃发动机燃烧及排放性能的影响 |
| Effect of biodiesel mixed with ammonia on the combustion and emission performance of homogeneous charge compression ignition engine |
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| DOI： |
| 中文关键词: 生物柴油 氨气 均质压燃 燃烧 排放 |
| 英文关键词:biodiesel ammonia gas homogeneous charge compression ignition combustion emission |
| 基金项目: |
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| 中文摘要: |
| 为提升燃料的综合燃烧品质和性能，进一步降低有害物质排放和缓解温室效应，以燃烧动力学和化学反应机制作为理论基础，采用Chemkin软件将生物柴油替代物和氨气充分融合，模拟并计算氨气掺混比例分别为0、5%、10%、15%、20%的5组燃料在均质压燃发动机模式下燃烧和排放指标的数值，对比分析得到不同掺混比例对发动机燃烧和排放的影响和变化规律。结果表明：随着氨气掺混比例增加，燃料的点火滞燃期有所缩短，缸内燃烧最高温度升高，排温降低；排放方面，NOx的排放升高，CO2、CO和总碳氢化合物（THC）的排放均明显降低；生物柴油掺混氨气的最佳比例为20%，此时发动机功率下降12百分点，NO的单位功率排放升高了0.003 kW-1，而CO2和THC的单位功率排放分别降低了0.01 kW-1和0.001 3 kW-1。综上，生物柴油掺混氨气后改善了燃烧性能，降低了排放量，具有良好的应用前景。 |
| 英文摘要: |
| In order to improve the comprehensive combustion quality and performance of the fuel, further reduce the emission of harmful substances and mitigate the greenhouse effect, based on the theoretical basis of combustion kinetics and chemical reaction mechanism, the Chemkin software was used to fully integrate the mechanism of biodiesel substitute and ammonia gas, simulate and calculate the combustion and emission values of 5 groups of fuels with the ammonia gas molar ratio of 0, 5%, 10%, 15% and 20% respectively in homogeneous charge compression ignition engine mode. The effects and change rule of different mixing ratio on engine combustion and emission were compared and analysed. The results showed that with the increase of ammonia gas ratio, the ignition delay period of fuel was shortened, the maximum combustion temperature in the cylinder increased, and the exhaust temperature decreased. In terms of emission, NOx emission increased, while CO2, CO and total hydrocarbon (THC) emissions decreased significantly. The optimal ratio of biodiesel blended with ammonia gas was 20%, and under this condition, the engine power decreased by 12 percentage, and the unit power emission ratio of NO increased by 0.003 kW-1, while the unit power emission ratios of CO2 and THC decreased significantly, which were 0.01 kW-1 and 0.001 3 kW-1 respectively. In conclusion, biodiesel blended with ammonia gas significantly improves combustion and reduces emissions, and has good application prospect. |
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