| 线化欧拉方程的高阶间断有限元数值解法研究 |
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| 引用本文： | 吕宏强,朱国祥,宋江勇,伍贻兆.线化欧拉方程的高阶间断有限元数值解法研究[J].力学学报,2011,43(3):621-624. |
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| 作者姓名： | 吕宏强 朱国祥 宋江勇 伍贻兆 |
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| 作者单位： | 1.南京航空航天大学航空宇航学院 |
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| 基金项目： | 教育部博士点基金(20070287024); 航空基金(2008ZA52003)资助项目~~ |
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| 摘 要： | 采用高阶间断有限元法于非结构网格上针对复杂外形数值求解声学控制方程------线化欧拉方程. 背景流场采用有限体积法于结构网格求得, 一种高精度数据传递方法将基于有限体积法的背景流场数据传递到声场计算所采用的较为稀疏的非结构网格上, 保证了背景流场信息的完整和精确. 为提高计算效率, 采用了一种更为直接的Quadrature-FreeImplementation技术以及网格分区并行技术. 数值结果表明采用高阶的情况下即使在稀疏的网格上也可以捕捉到细微的声场结构.
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| 关 键 词： | 并行计算 |
| 收稿时间： | 2010-02-01 |
| 修稿时间： | 2010-04-07 |
HIGH-ORDER DISCONTINUOUS GALERKIN SOLUTION OF LINEARIZED EULER EQUATIONS |
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| Lü Hongqiang
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Zhu Guoxiang
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Song Jiangyong
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Wu Yizhao.HIGH-ORDER DISCONTINUOUS GALERKIN SOLUTION OF LINEARIZED EULER EQUATIONS[J].chinese journal of theoretical and applied mechanics,2011,43(3):621-624. |
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| Authors: | Lü Hongqiang Zhu Guoxiang Song Jiangyong Wu Yizhao |
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| Institution: | 1.College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China2.Beijing Research Institute of Mechanical & Electrical Technology, Beijing 100074, China3.AVIC Flight Test Establishment, Xi'an 710089, China |
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| Abstract: | In this paper,the linearized Euler equations(LEE) for aero-acoustics are solved using high-order Discontinuous Galerkin(DG) on unstructured grid for complex geometries.The background field,calculated using Finite Volume Method on structured grid,is first transferred into the LEE grid with a highly accurate method.A straightforward quadrature-free implementation method and parallel computing are used to accelerate the computation.Numerical tests indicate that very detailed features can be resolved even thoug... |
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| Keywords: | high-order discontinuous Galerkin Quadrature-Free Implementation linearizaed Euler equations parallel computing |
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