基于AVL-Fire的某1.5L发动机进气道优化设计

Optimization Design a 1.5L Gasoline EngineIntake Port Based on AVL-Fire

设计合理的进气道有利于燃烧,从而对发动机的动力性和经济性起决定性作用,选择现有的一款1.5L发动机进气道,应用CAD模型、AVL-Fire软件进行CFD数值仿真分析,结合气道试验台实验数据校核仿真模型。以现有进气道的试验数据,综合考虑滚流比、流量系数,基于CAD对现有进气道进行优化设计,并用AVL-Fire软件对优化设计后的模型进行CFD分析。根据CFD仿真结果,优化后的模型在大气门升程滚流比有所提高,从而达到优化发动机经济性的目的。

A well designed intake port is conducive to combustion which plays a decisive role in engine power and fuel economy. In this paper,an existing 1.5 L engine intake port is selected and the CAD model and AVL-Fire software are used for CFD numerical simulation analysis. Check the simulation model based on the experimental data of the airway test bench. Based on the test data of the existing intake port and the tumble ratio and flow coefficient are considered comprehensively. The existing intake port is optimized based on CAD and the optimized design model is analyzed by CFD using AVL-Fire software. The optimized model has an increase in the lift tumble ratio which achieve the goal of optimizing fuel economy according to the CFD simulation results.