Fluid dynamic modeling of junctions in internal combustion engine inlet and exhaust systems

查看全文 作　　者：David [1]Chalet;Pascal [1]Chesse

机构地区：[1]Internal Combustion Engine Team,Laboratory of Fluid Mechanics-UMR CNRS 6598 Ecole Centrale de Nantes,BP 92101 44321 Nantes,France

出　　处：《Journal of Thermal Science》索引2010年第19卷第5期,共9页

摘　　要：The modeling of inlet and exhaust systems of internal combustion engine is very important in order to evaluate the engine performance.This paper presents new pressure losses models which can be included in a one dimensional engine simulation code.In a first part,a CFD analysis is made in order to show the importance of the density in the modeling approach.Then,the CFD code is used,as a numerical test bench,for the pressure losses models development.These coefficients depend on the geometrical characteristics of the junction and an experimental validation is made with the use of a shock tube test bench.All the models are then included in the engine simulation code of the laboratory.The numerical calculation of unsteady compressible flow,in each pipe of the inlet and exhaust systems,is made and the calculated engine torque is compared with experimental measurements. 关键词：计算流体力学进排气系统内燃机动态建模发动机性能实验室模拟连接压力损失

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Fluid dynamic modeling of junctions in internal combustion engine inlet and exhaust systems

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