摘要
网格自适应是一种有效减少解与网格相关性,改善计算结果的重要途径。给出了一种基于误差估计的伴随网格自适应计算技术,定义了基于误差估计的自适应准则,给出了非结构四面体网格单元细化剖分规则,以及一般的网格自适应流程,介绍了一种基于Rechardson外推的网格收敛技术,运用本文提供的方法对NLR7301翼型进行了数值计算研究,数值试验表明给出的网格自适应具有较高的可有效改善计算结果。
Grid adaptation is an effective way to eliminate the solution dependence to grid and improve the solution accuracy,in the paper,solution adaptive mesh refinement based on output-based error estimation is presented,the estimated error in the functional can be defined as product of the local residual errors of the primal and solutions of adjoint equation,in the paper,construction of the sensor and an unstructured grid element division method and a general grid adaptation procedure is introduced.Numerical example of NLR7301 airfoil indicates that solution adaptive mesh refinement based on output-based error estimation can observably improve the accuracy of integral output function of interest.
出处
《航空计算技术》
2011年第3期14-16,21,共4页
Aeronautical Computing Technique
基金
国家"973"计划基金项目资助(2009CB723804)
航空科学基金项目资助(20081431003)
总装预研基金项目资助(9140A160308HK61)
关键词
伴随方程
网格收敛分析
自适应准则
非结构网格剖分
adjoint equation
grid convergence analysis
adaptation sensor
unstructured grid division
