基于CFD技术的子午线轮胎滚动工况的流场分析

Flow Field Analysis on Radial Tire under Rolling Condition Based on CFD Technology

从计算流体动力学的角度,以12.00R20全钢载重子午线轮胎在速度70km·h-1下的滚动工况为研究对象,通过Abaqus有限元分析,将模型的速度及形变变化信息经C语言程序处理后重划网格,最后经Fluent的UDF自定义函数导入,并进行流体动力学分析。Fluent中的流场分析拆分为多个时刻,中间以插值的形式进行衔接,从而进行轮胎逐步滚动的流体动力学模拟,得到轮胎滚动时的流场,研究轮胎花纹块对气动阻力系数和流场压强的影响。结果表明,带复杂花纹轮胎的气动阻力系数较大,且出现湍流现象,流场压强明显增大。

The finite element model of the 12.00R20 all steel truck and bus radial tire under rolling condition was established using Abaqus software.Under the rolling at the speed of 70km·h^-1,the change of speed and deformation of the model were processed by C programming language and the finite element grid was redrawn based on computational fluid dynamics（CFD）.Then,the custom function was imported by using UDF in Fluent,and the fluid dynamics analysis was carried out.The Fluent analysis of the flow field was split into multiple time points and the interpolated values of the function were used in between.Then,the fluid dynamics simulation of gradually rolling tire and the flow field were obtained,and the effect of pattern blocks on the aerodynamic drag coefficient and flow field pressure was investigated.The results showed that,the aerodynamic drag coefficient of the tire with complex pattern blocks was bigger,where turbulence phenomena appeared,and the flow field pressure increased significantly.