基于数值模拟的LJ465Q发动机进气道结构优化  

Optimization of Intake Port of LJ465Q Engine Based on Numerical Simulation

作　　者：李春青[1] 姜峰[1] 文代志 

机构地区：[1]广西科技大学,柳州545006 [2]柳州五菱柳机动力有限公司,柳州545005

出　　处：《汽车技术》2016年第5期11-14,共4页Automobile Technology

基　　金：广西自然科学基金项目(2013GXNSFAA019317);广西高校科学技术研究项目(KY2015YB168);广西重点实验室建设项目(14-A-01-04);广西重点实验室开放基金项目(2014KFMS02)

摘　　要：以LJ465Q汽油机进气道为研究对象,利用UG软件对该进气道进行实体建模,通过气道稳流试验对模拟计算提供边界条件。利用AVL-FIRE软件进行进气道-进气门-气缸流动的稳流三维数值模拟计算,研究在不同气门升程下不同进气门倒角对缸内流场的影响。结果表明,在不同气门升程下进气门倒角为30°时较之气门倒角为20°、45°、60°时的流量系数呈现最优值,即该角度可作为改善该机进气道流量系数的最佳方案。In this paper, we take the intake port of LJ465 Q engine as research object, and use UG software to establish the solid model of intake port, and carry out the steady flow test to provide the boundary conditions for the simulation. Numerical simulations of the steady flow of port-valve-cylinder system are carried out by software AVL-FIRE to study the effects of the variable inlet cone angle under the variable valve lift on cylinder flow performances. The results show that the inlet cone angle 30° has the optimal flow coefficient under the variable valve lift compared with the angles of20°, 45° and 60°, therefore the inlet cone angle 30° could be used as the optimal way to improve flow coefficient of intake port.

关 键 词：汽油机 进气门倒角 缸内流场 数值模拟 

分 类 号：U464.134.4[机械工程—车辆工程]