| 非定常Euler方程数值计算中高精度格式应用 |
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| 引用本文： | 赵云飞,刘绪,涂国华,刘伟,毛枚良.非定常Euler方程数值计算中高精度格式应用[J].国防科技大学学报,2012,34(3):12-16. |
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| 作者姓名： | 赵云飞 刘绪 涂国华 刘伟 毛枚良 |
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| 作者单位： | 1. 国防科技大学航天与材料工程学院,湖南长沙,410073
2. 空气动力学国家重点实验室,四川绵阳,621000 |
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| 基金项目： | 国家部委资助项目，国家自然科学基金资助项目 |
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| 摘 要： | 采用五阶精度加权紧致非线性格式(WCNS)和非定常“双时间步”方法求解非定常Euler方程,模拟NACA0012翼型强迫俯仰振动流场,研究了高精度格式应用到非定常计算时“双时间步”方法物理时间步长、子迭代收敛判据、子迭代步数以及物理时间导数离散方法对计算精度和计算效率的影响.
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| 关 键 词： | 高精度格式 非定常流动 WCNS格式 Euler方程 数值模拟 |
| 收稿时间： | 2011/6/24 0:00:00 |
High-accuracy numerical method applied to calculate unsteady Euler equations |
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| ZHAO Yunfei,LIU Xu,TU Guohu,LIU Wei and MAO Meiliang.High-accuracy numerical method applied to calculate unsteady Euler equations[J].Journal of National University of Defense Technology,2012,34(3):12-16. |
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| Authors: | ZHAO Yunfei LIU Xu TU Guohu LIU Wei and MAO Meiliang |
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| Institution: | 1.College of Aerospace and Materials Engineering,National University of Defense Technology,Changsha 410073,China; 2.State Key Laboratory of Aerodynamics,Mianyang 621000,China) |
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| Abstract: | By applying 5-order accuracy WCNS(Weighted Compact Nonlinear Schemes) to simulate forced-oscillation of NACA0012 aerofoil,some techniques of high-accuracy method in unsteady simulation were studied,such as inner iteration capability,inner iteration parameters of "dual time stepping" method,and discretization accuracy of time derivatives of Euler equations.The results show that,these coefficients have a remarkable effect on computation accuracy and CPU time when WCNS scheme is applied to unsteady flow simulation. |
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| Keywords: | high-order accurate scheme unsteady flows WCNS schemes Euler equations numerical simulation |
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