国产客车车身周围流场数值模拟的空间离散

Space discretization of the numerical simulation for the flow field around Chinese-made bus body

在对国产客车车身周围二维流场空间离散研究的基础上 ,采用代数和椭圆型方程相结合的方法 ,对国产客车车身周围三维空间进行单元划分。为提高单元划分质量 ,提出适合客车车身周围空间单元划分的“指数密度控制方法”。利用抛物化的椭圆型方程 ,提高了网络单元的划分速度。为了优化节点编号 ,提出“最少节点数阵面推进法”。

On the bases of study of the two-dimension flow field around the Chinese-made bus,the three-dimension flow field surrounding the Chinese-made bus body has been partitioned by using the method that composes of algebra equation and ellipse equation.An “Exponent Function Control Method” which adapts to discretization of the space surrounding bus body is presented to advance the quality of the element generation.For raising the speed of discretizating,the elliptic equation that is improved by parabola has been applied.The method that has been known as “the Least Node Amount Section Advance Front” is educed to optimize the order of node number.At the same time,the element and node information have been generated automatically.