| 引用本文: | 赵云飞,刘绪,涂国华,等.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.[点击复制] |
| ZHAO Yunfei,LIU Xu,TU Guohua,et al.High-accuracy numerical method applied to calculate unsteady Euler equations[J].Journal of National University of Defense Technology,2012,34(3):12-16[点击复制] |
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| 非定常Euler方程数值计算中高精度格式应用 |
| 赵云飞1, 刘绪1, 涂国华2, 刘伟1, 毛枚良2 |
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(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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| 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。 |
| 关键词: 高精度格式 非定常流动 WCNS格式 Euler方程 数值模拟 |
| DOI： |
| 投稿日期：2011-06-24 |
| 基金项目:国家部委资助项目；国家自然科学基金资助项目(11172325，90716015) |
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| High-accuracy numerical method applied to calculate unsteady Euler equations |
| ZHAO Yunfei1, LIU Xu1, TU Guohua2, LIU Wei1, MAO Meiliang2 |
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(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. |
| Keywords: high-order accurate scheme unsteady flows WCNS schemes Euler equations numerical simulation |
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