空气动力学学报2017，Vol.35Issue(6)：860-865,6.DOI:10.7638/kqdlxxb-2015.0080
空气动力分析中动网格技术的数值阻尼
Numerical damping of dynamic mesh for aerodynamic analysis
摘要
Abstract
In order to carry out aerodynamic analysis with the FLUENT software and constant averaged acceleration Newmark method on dynamic mesh, the algorithm in the Newmark method needs to be changed due to the limitation of the data transfer mode.For the validation of this modification,numerical tests were simulated to show the deficiency in the algorithm.Based on these tests,we propose a hypothesis that numerical damping is introduced by the algorithm.This assumption was proved by mathematics method,and theoretical formula was provided to calculate the numerical damping.The effectiveness of this formula was validated by calculating numerical dumping in a test and calibrating the algorithm with the calculated numerical dumping.Moreover,this formula was applied to some engineering applications.关键词
FLUENT/动网格/Newmark法/数值阻尼Key words
FLUENT/dynamic mesh/Newmark method/numerical damping分类
航空航天引用本文复制引用
赵张峰,邓洪洲..空气动力分析中动网格技术的数值阻尼[J].空气动力学学报,2017,35(6):860-865,6.基金项目
国家自然科学基金(51578421) （51578421）
