四气门汽油机工作过程的瞬态模拟计算

Transient Simulation of Working Process for Four-valve Gasoline Engine

摘要:

利用AVL-Fire软件,建立某汽油机的气道及缸内流动区域在进气、压缩和做功行程的动态网格,并在此基础上模拟计算三维数值,分析不同行程气道及缸内气体速度、湍流动能、温度和压力的分布情况,获得更详细的流场信息,为该汽油机的设计提供相关理论依据和参考.

Abstract:

Software AVL-Fire was used to create the dynamic meshes of intake port and cylinder flow area of gasoline engine,in the strokes of intake,compression and expansion.The three-dimensional numerical simulation calculation was processed,and through the analysis of the distribution of air velocity,turbulent kinetic energy,temperature and pressure under different valve strokes,a more detailed flow field information was obtained,which provides a theoretical basis and reference to the design of the gasoline engine.