| 基于预处理的非稳态流场计算方法 |
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| 引用本文： | 李东霞,徐旭,陈兵,蔡国飙,张振鹏.基于预处理的非稳态流场计算方法[J].固体火箭技术,2006,29(3):169-173. |
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| 作者姓名： | 李东霞 徐旭 陈兵 蔡国飙 张振鹏 |
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| 作者单位： | 北京航空航天大学宇航学院,北京,100083;北京航空航天大学宇航学院,北京,100083;北京航空航天大学宇航学院,北京,100083;北京航空航天大学宇航学院,北京,100083;北京航空航天大学宇航学院,北京,100083 |
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| 摘 要： | 采用预处理方法可提高Navier-Stokes方程或Eu ler方程计算低马赫数流场的准确度和收敛性能。采用双时间步和预处理相结合的方法计算非稳态流场,保证了采用预处理方法后计算结果的时间精确性。在每一物理时间步,控制方程虚拟时间导数项采用LU隐式时间格式,对流通量采用AUSM 和MUSCL格式进行求解。通过对前台阶流和圆柱绕流的计算,验证了该方法的广泛适用性和计算结果的可靠性。
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| 关 键 词： | 双时间步 预处理 非稳态流场 |
| 文章编号： | 1006-2793（2006）0342169-05 |
| 收稿时间： | 2005-10-20 |
| 修稿时间： | 2005-12-28 |
Calculation method of unsteady flow field based on preconditioning method |
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| LI Dong-xia,XU Xu,CHEN Bing,CAI Guo-biao,ZHANG Zhen-peng.Calculation method of unsteady flow field based on preconditioning method[J].Journal of Solid Rocket Technology,2006,29(3):169-173. |
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| Authors: | LI Dong-xia XU Xu CHEN Bing CAI Guo-biao ZHANG Zhen-peng |
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| Institution: | School of Astronautics, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083,China |
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| Abstract: | The accuracy and convergence characteristics of N-S or Euler equations used for calculating low Mach number flow field were improved by using preconditioning method.Time precision of calculation results of unsteady flow field was ensured by using combined method of dual-time step and preconditioning.Control equation in which virtual time derivatives used LU implicit time scheme and convection flux used AUSM and MUSCL scheme was solved at every physical time step.Through calculation of forward-facing step flow and circular cylinder,the algorithm was proven to be of wide applicability and reliability. |
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| Keywords: | dual-time step preconditioning unsteady flow |
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