高能点火稀薄混合气初期火核发展的数值仿真研究

马鹏飞; 李铁; 黄帅; 谢思瑜; 依平

doi:10.3969/j.issn.1001-2222.2020.03.001

车用发动机 >

2020 , Vol. 0 >Issue 3: 1 - 6

DOI: https://doi.org/10.3969/j.issn.1001-2222.2020.03.001

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高能点火稀薄混合气初期火核发展的数值仿真研究

马鹏飞 ,
李铁 ,
黄帅 ,
谢思瑜 ,
依平

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（1.上海交通大学海洋工程国家重点实验室，上海 200240；2.上海交通大学高新船舶与深海开发装备协同创新中心，上海 200240）

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Numerical Simulation of Early Flame Kernel Development for Lean Mixture with High-Energy Ignition

MA Pengfei ,
LI Tie ,
HUANG Shuai ,
XIE Siyu ,
YI Ping

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(1.State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China)

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摘要

增加点火能可以促进火花点火发动机稀薄燃烧条件下初期火核的发展，对初期火核发展过程进行仿真分析可进一步理解点火策略对火核的影响。采用一维拉格朗日模型，在不同压力下对不同当量比的稀薄天然气空气混合气初期火核生长进行仿真计算。通过改变并联线圈数来改变点火能量，并通过试验测得不同点火策略的间隙电压及次级线圈电流。结果表明，稀薄高压情况下初期火核发展缓慢，增加并联点火线圈数可以增加点火能，促进初期火核发展。

关键词： 点火模型; 点火策略; 稀薄燃烧

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马鹏飞 , 李铁 , 黄帅 , 谢思瑜 , 依平 . 高能点火稀薄混合气初期火核发展的数值仿真研究[J]. 车用发动机, 2020 , 0(3) : 1 -6 . DOI: 10.3969/j.issn.1001-2222.2020.03.001

Abstract

The increase of ignition energy can help the early flame kernel growth of the leanburn sparkignition engines. Modeling the early flame kernel development can help understand how the ignition strategy influences the flame kernel. The early flame kernel expansion of lean natural gas and air mixture with different equivalent ratios was simulated using a 1D Lagrangian ignition model under different pressures. The ignition energy was changed by changing the number of parallel coils and the gap voltage and secondary coil current of different ignition strategies were measured through the experiment. The results show that the flame kernel of lean and highpressure mixture expands slowly. Increasing the number of parallel coils can increase the ignition energy, which can help the kernel expansion.

Key words： ignition model; ignition strategy; lean-burn

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