非对称涡轮增压器一维配机计算方法研究  

Study on One-dimensional Calculation Method of Asymmetric Turbocharger Matching Engines

作　　者：许汉君[1] 谢爱元 杨海涛[1] XU Hanjun;XIE Aiyuan;YANG Haitao(FAW Wuxi Fuel Injection Equipment Research Institute,Wuxi 214063,China)

机构地区：[1]中国一汽无锡油泵油嘴研究所,江苏无锡214063

出　　处：《现代车用动力》2018年第3期6-9,48,共5页Modern Vehicle Power

摘　　要：非对称涡轮增压器可在保证柴油机废弃再循环(EGR)率的同时降低泵气损失,由于涡轮机的两个流道流量不对称,需要在一维配机计算中使用恰当的模型反映不对称性造成的影响。本研究采用GT-Power软件计算对比了对涡轮机模型进行复杂建模和简单建模的2种策略对结果的影响,采用对两个流道分别建模的复杂模型需要使用两流道折合流量比例不同的8张涡轮机脉谱(Map)图,而使用简单模型仅需1张Map图。通过与发动机试验数据对比,表明采用对两个流道分别建模的复杂模型计算误差小于简单模型。The asymmetric turbocharger can reduce the pump gas loss while ensuring the EGR rate of diesel engine. Due to the asymmetry of two ports of the turbine,it is necessary to use the appropriate model to reflect the influence of asymmetry in the one-dimensional calculation. In this paper,the calculation methods using the complex turbine modeling and simple turbine modeling were established in GT-Power software. The complex model requires eight turbine maps with different flow ratios of two ports,however,simple model requires only one map. Then the effect of the two methods on the calculation result is calculated and analyzed. Comparing with the experimental data,it shows that the calculation error of the complex model is less than the simple model.

关 键 词：柴油机 废弃再循环 涡轮增压器 非对称 数值模拟 

分 类 号：TK423.52[动力工程及工程热物理—动力机械及工程]