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Numerical simulation of diesel combustion based on n-heptane and toluene
Propulsion and Power Research ( IF 5.3 ) Pub Date : 2019-02-14 , DOI: 10.1016/j.jppr.2019.01.009
Kesong Zhang , Qiangzhi Xin , Zhenqian Mu , Zhijian Niu , Zhiming Wang

Considering the self-ignition characteristic and C/H ratio, n-heptane and toluene (6:4 by mass) are chosen to constitute diesel surrogate fuel, and a reduced oxidation mechanism was developed. This mechanism was firstly validated by the combustion of diesel fuel in different oxygen concentrations within a constant volume vessel by high-speed photography. The simulated flame temperature distribution reproduces the diesel combustion process quite well. For further validation, combustion in real diesel engine was also investigated numerically and experimentally using a light duty diesel and a marine diesel. The calculated pressure curves in different operation conditions fit the measured data reasonably well. The oxidation mechanism could reproduce the main characteristics including combustion phase and NOx emission of diesel combustion in different cases.



中文翻译:

基于庚烷和甲苯的柴油燃烧数值模拟

考虑到自燃特性和C / H比,选择庚烷和甲苯(质量比为6:4)构成柴油替代燃料,并开发了还原的氧化机理。首先通过高速摄影在恒定容积的容器内以不同氧气浓度燃烧柴油燃料来验证这种机理。模拟的火焰温度分布很好地再现了柴油的燃烧过程。为了进一步验证,还使用轻型柴油和船用柴油在数值和实验上研究了实际柴油机中的燃烧。在不同工况下计算出的压力曲线相当吻合实测数据。氧化机理可以再现燃烧相和NO的主要特征x在不同情况下的柴油燃烧排放。

更新日期:2019-02-14
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