基于平面激光Mie散射技术的乙醇喷雾特性研究  

Research on Ethanol Spray Characteristics Based on Laser-Sheet Mie-Scattering Technique

作　　者：鄂亚佳 许敏[1] 曾纬[1] 张高明[1] 张玉银[1] 

机构地区：[1]上海交通大学汽车电子控制技术国家工程实验室,上海200240

出　　处：《内燃机工程》2011年第2期63-67,73,共6页Chinese Internal Combustion Engine Engineering

摘　　要：采用平面激光Mie散射技术,利用直喷式发动机的多孔喷油器,研究了喷射压力、环境压力对乙醇喷雾特性的影响,并与汽油喷雾进行对比。试验结果表明:乙醇喷雾的贯穿距随着喷射压力的升高和环境压力的降低而增大;喷雾锥角随着环境压力和喷射压力的升高而增大。乙醇喷雾的初速度和贯穿距小于汽油喷雾,其喷雾锥角与汽油无明显差别。As the initial step towards developing an optimized ethanol SIDI engine,the ethanol sprays using the Mie-scattering optical diagnostic technique were studied.The effects of injection pressure and ambient pressure on ethanol spray characteristics were examined.Experimental results show that the ethanol spray penetration increases with injection pressure increasing and ambient pressure decreasing,spray angle increases with injection pressure and ambient pressure increasing.Compared to gasoline spray in the same conditions,ethanol spray initial speed and penetration reduce,and there is no significant difference in spray angle.

关 键 词：内燃机 缸内直喷火花点火式发动机 乙醇 喷雾特性 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]