两级增压涡轮几何参数对发动机性能的影响研究  

Influence of Geometry Parameters for Two-stage Supercharging Turbine on Diesel Engine Performance

作　　者：谢磊[1] 张扬军[1] 诸葛伟林[1] 张树勇[2] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084 [2]中国北方发动机研究所柴油机高增压国家级重点实验室,山西大同037036

出　　处：《车用发动机》2011年第6期33-37,共5页Vehicle Engine

摘　　要：基于涡轮通流模型,建立两级增压通流仿真平台,探讨了两级涡轮几何参数的改变对发动机性能的影响规律及原因,采用该平台对某车用两级增压柴油机进行仿真研究,并完成两级涡轮新的匹配设计。匹配结果表明,通过合理设计两级涡轮几何参数,可使该发动机低速扭矩提高7.4%,燃油消耗率降低6.9%。Based on turbine through-flow model, the platform of two-stage turbocharging through-flow simulation was established and the influences of two-stage turbine geometry parameters on engine performance were discussed. Based on the platform, a vehicle two-stage turbocharging diesel engine was simulated and the match design of the two-stage turbine was completed. The simulation results show that the appropriate geometry parameters of two-stage turbocharger can make the low-speed torque increase by 7.4% and fuel consumption decrease by 6.9%.

关 键 词：涡轮增压 两级增压 涡轮通流模型 几何参数 性能 匹配 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]