柴油机可调涡流进气道设计与试验  

Development of Intake Ports with Variable Swirl System in a Diesel Engine

作　　者：李向荣[1] 张薇[1] 杜巍[1] 

机构地区：[1]北京理工大学机械与车辆工程学院

出　　处：《农业机械学报》2007年第10期10-14,共5页Transactions of the Chinese Society for Agricultural Machinery

摘　　要：将进气涡流的数值仿真和稳流试验测试运用到柴油机进气道设计中,用正向设计和逆向设计相结合的方法为132mm缸径柴油机设计了可调涡流进气道,利用快速成型和数控加工制作出气道的相关模型和气道砂芯模具,并铸造出缸盖。发动机试验表明,油耗下降7.1/(.),烟度下降50%,排气温度下降17℃。The numerical simulation and steady flow testing approach were applied to the design of diesel engine air-intake ports. Furthermore, by using forward design and reverse engineering, the intake ports have been developed which were suitable for the variable swirl system of a diesel engine with bore diameter 132 mm. The models and moulds of the intake ports were machined by the method of rapid prototyping and numerical control machining.＂ Subsequently, sand core moulds of an intake ports have been made, and cylinder head has been molded. Some tests were completed on a single-cylinder diesel engine. The results showed a remarkable performance improvement has been reached that fuel consumption decreased 7.1 g/（kW · h）, the emission of soot decreased by 50% and the temperature of exhaust decreased to 17℃.

关 键 词：柴油机 进气道 可调进气涡流 仿真 设计 稳流试验 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]