螺旋气道的参数化建模和流动特性影响因素分析  

Parametric Modeling of Helical Intake Port and the Influencing Factors Analysis of its Flow Characteristics

作　　者：雷基林[1] 申立中[1] 毕玉华[1] 贾德文[1] 王鑫鑫[1] 

机构地区：[1]昆明理工大学云南省内燃机重点实验室,昆明650500

出　　处：《汽车工程》2013年第1期27-31,共5页Automotive Engineering

基　　金：国家自然科学基金(51105184);云南省应用基础研究基金项目(2009ZC036M)资助

摘　　要：在运用CAD软件建立螺旋气道(包括螺旋段、直流段和过渡段)的参数化几何模型的基础上,采用AVL Fire软件建立了进气流动仿真模型,并以新型2D25柴油机为例进行了试验验证。接着,选用气道入口的高度与截面尺寸和涡流室高度作为3个影响因素,并各自设置3个水平;以平均涡流比和平均流量系数这两个气道流动特性参数作为计算指标,进行正交试验。分析结果表明,在3个影响因素中,涡流室高度对气道流动特性的影响最大,气道入口截面尺寸的影响最小。Based on the parameterized geometric model for helical intake port consisting of spiral, straight line and transitional segments built with CAD software, an intake flow simulation model for helical intake port is set up by using software AVL Fire and is verified by the test on a new 2D25 diesel engine as an example. Then an or- thogonal test is conducted with the height and sectional dimension of port entrance and the height of swirl chamber selected as three influencing factors with 3 levels defined for each factor and two port flow characteristic parameters （mean swirl ratio and mean flow rate coefficient） as indicators. The results indicate that among three factors, the swirl chamber height has the strongest effect on the flow characteristics of helical intake port, and the effect of sectional dimension of port entrance is the weakest.

关 键 词：柴油机 螺旋进气道 参数化建模 流动特性 影响因素 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术] TK421[自动化与计算机技术—计算机科学与技术]