煤基合成柴油燃烧及排放特性的数值模拟研究
Numerical study on the combustion and emission characteristics of coal-to-liquid
基于一台压燃式发动机建立了数值模拟平台,对具有不同煤基合成柴油(coal-to-liquid,CTL)质量分数的柴油/CTL混合燃料燃烧过程进行了三维数值模拟研究。结果表明,随着CTL比例的增加,燃烧过程中低温反应阶段OH质量上升的速度增加,导致低温反应进程加快,着火提前,滞燃期缩短。CTL比例较高的燃料具有较低的预混燃烧比例、较慢的燃烧速度与较低的燃烧温度。CTL对碳烟生成的影响机制主要体现在燃料组分和预混合燃烧比例方面。一方面,由于燃料组分中…查看全部>>
Based on a compression ignition engine,a simulation model was established and the combustion processes of diesel/coal-to-liquid(CTL)blends with different CTL mass fractions were studied using the three-dimensional simulation method.The results indicate that as the CTL mass fraction increases,the accumulation of OH radical is accelerated during the low-temperature reaction stage,leading to the accelerated low-temperature reaction process,the earlier ignition …查看全部>>
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