| 摘要:以某型船用柴油机为研究对象,通过对不同燃油温度下喷油嘴内部的流动仿真分析,对喷嘴内部的流动和空穴现象进行了研究,得到合理的喷孔出口处油滴的初始状态；通过喷雾和缸内燃烧的耦合计算,分析不同的燃油温度对柴油机燃烧及排放特性的影响规律。研究结果表明:燃油进机温度直接影响燃油喷雾、破碎、蒸发及燃烧过程,对NOx排放影响更为明显；燃油进机温度须作为柴油机燃烧系统开发试验时的试验基准之一。 |
| 关键词: 船用柴油机 燃油温度 CFD 燃烧 喷雾 |
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| Simulation Research of the Influence of Different Fuel Temperatureson Marine Diesel Engine’s Spray and Combustion Characteristics |
| He Guojing,Zhang Wenzheng,Ping Tao,Yan Ping,Sun Qiang |
| Shanghai Marine Diesel Engine Research Institute, Shanghai 201108 |
| Abstract:Based on a marine diesel engine, through the simulation analysis on nozzle inner flow under different fuel temperatures, research was carried out on nozzle inner flow and nozzle cavitation phenomenon, the reasonable initial condition of the oil droplets was obtained. By calculating the spray coupling with cylinder combustion, the influence of different fuel temperatures on the combustion and emission of the diesel was analyzed. It was found that fuel temperature directly affected the fuel spray, broken, evaporation and combustion process, and the influence on NOx emission was more apparent. Fuel temperature should be taken as a test criterion during the development of the diesel engine combustion system. |
| Key words: marine diesel engine fuel temperature CFD combustion spray〖FL |
