摘要
本文发展了非结构重叠网格技术。通过构造任意单元类型网格重叠的网格间边界确定算法、宿主单元搜索算法以及网格间插值算法,把非结构重叠网格推广应用于求解NS方程,并结合湍流模型模拟二维湍流流场。N-S方程的求解采用有限体积法,通量计算采用Osher格式,湍流模型采用SA模型。为验证本文方法的正确性和有效性,模拟了RAE2822翼型和某三段翼型绕流湍流流场,结果表明采用非结构重叠网格模拟复杂外形湍流流场不但网格生成效率高,而且容易推广应用于具有相对运动的非定常问题,具有较高的工程应用价值。
The overset unstructured grid method is developed to solve N-S equation. The developed intergrid boundary definition method, searching algorithm and interpolation method can tread arbitrary element grid. The finite volume method is implemented to N-S equation. SA turbulence model is used to simulate turbulence flow field. Two cases are used to validate the overset unstructured grid method. All the results show that the overset unstructured grid method is efficient in simulating complex computational domain and can be easily extended to unsteady flow problem.
出处
《空气动力学学报》
EI
CSCD
北大核心
2008年第3期405-411,共7页
Acta Aerodynamica Sinica
基金
航空科学基金(00A52010-012)
