| 喷油压力对柴油机喷雾、混合及燃烧特性影响的数值模拟研究 |
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| 引用本文： | 张晶,袁野,李国岫. 喷油压力对柴油机喷雾、混合及燃烧特性影响的数值模拟研究[J]. 内燃机, 2011, 0(5): 22-24,55 |
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| 作者姓名： | 张晶 袁野 李国岫 |
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| 作者单位： | 北京交通大学机械与电子控制工程学院,北京,100044 |
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| 摘 要： | 基于对某型直喷式柴油机缸内工作过程的多维数值模拟，研究了喷油压力对燃油喷雾特性、油气混合特性、燃烧特性及柴油机性能的影响规律。结果表明：提高喷油压力，喷雾粒度越细，燃油蒸发速度加快，油气混合的速度和均匀度均得到改善，缩短了燃烧持续期，提高了循环热效率，但是平均压力升高率呈线性增加，影响工作过程的稳定性。
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| 关 键 词： | 柴油机 喷油压力 喷雾 混合 燃烧 |
The Numerical Simulation of Injection Pressure on Diesel Spray,Mixing and Combustion Characteristics |
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| ZHANG Jing,YUAN Ye,LI Guo-xiu. The Numerical Simulation of Injection Pressure on Diesel Spray,Mixing and Combustion Characteristics[J]. Internal Combustion Engines, 2011, 0(5): 22-24,55 |
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| Authors: | ZHANG Jing YUAN Ye LI Guo-xiu |
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| Affiliation: | ZHANG Jing,YUAN Ye,LI Guo-xiu(School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | Based on the multi-dimensional numerical simulations of DI diesel engine working process,the law of injection pressure on fuel spray characteristics,mixing characteristics,combustion characteristics and engine performance were investigated.The results showed that: Through increasing injection pressure,the spray particle size is reduced,fuel evaporation rate is increased,mixing rate and uniformity are improved,the combustion duration is reduced,and thermal efficiency is improved.But the average pressure rise... |
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| Keywords: | diesel engine injection pressure spray mixing combustion |
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