柴油机涡轮增压器叶轮优化设计  

Impeller Optimization of Diesel Engine Turbocharger

作　　者：王琦玮[1] 倪计民[1] 关建熙 石秀勇[1] 陈沁青[1] 侯伟 

机构地区：[1]同济大学汽车学院,上海201804 [2]凤城市雨鑫增压器有限公司,辽宁凤城118100 [3]合鑫机械制造有限公司,辽宁凤城118100

出　　处：《车用发动机》2015年第3期32-36,共5页Vehicle Engine

摘　　要：以某废气涡轮增压柴油机为研究对象,以提高发动机性能为目标,使用CFD方法对其涡轮增压器的叶轮进行优化设计。通过分析叶轮内部流场,将叶轮叶片的叶型进行了改进设计,叶轮内部流场得到了优化。通过CFD计算得到了优化后的压气机MAP图,并将优化设计后的增压器安装到柴油机上进行了试验研究。结果表明,根据CFD计算结果对压气机叶轮结构进行优化设计具有可行性,优化设计的压气机能够在全转速范围内降低发动机燃油消耗率。In order to improve the engine performance ,impeller optimization was conducted on a turbocharged diesel engine with CFD .According to the simulation results ,the impeller blades were improved and the internal flow field was optimized . The optimized compressor MAP was acquired and its performance was verified by engine experiments .The results show that it is feasible to optimize the impeller structure according to CFD results .In addition ,the specific fuel consumption of diesel engine with optimized compressor declines in the whole speed range .

关 键 词：柴油机 涡轮增压器 压气机 叶轮 流场 计算流体力学 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]