| 高精度数值方法在DNS中的应用 |
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| 引用本文： | 肖凯涛,刘吉平,朵英贤,袁湘江.高精度数值方法在DNS中的应用[J].航空动力学报,2006,21(1):1-6. |
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| 作者姓名： | 肖凯涛 刘吉平 朵英贤 袁湘江 |
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| 作者单位： | 1.北京理工大学 机电工程学院, 北京 100081 |
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| 基金项目： | 中国科学院资助项目
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国家重大研究项目 |
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| 摘 要： | 利用不同格式模拟扰动波在平板边界层中的传播,考察了格式对T-S波传播过程计算结果的影响。研究了不同计算格式对自由剪切层扰动波增长的影响,结果表明:对于二维扰动波模型,采用二阶精度格式,扰动波在平板边界层中只能出现衰减的结果;在自由剪切层中,虽然能模拟出扰动波在传播过程中幅值的增长,但却在相当长的计算范围内看不见三维波的出现。但对于同样的扰动模型,如果采用高精度格式,在边界层中能出现增长的T-S波,并与线性理论非常吻合;在自由剪切层中,扰动波不仅迅速增长,并能在不很长的距离内,明显的看到三维波的出现,并激发出了三维结构。
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| 关 键 词： | 航空、航天推进系统 紧致格式 数值模拟 边界层 自由剪切层 |
| 文章编号： | 1000-8055(2006)01-0001-06 |
| 收稿时间： | 2005/9/27 0:00:00 |
| 修稿时间： | 2005年9月27日 |
Application of High-Order Accurate Scheme in DNS |
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| XIAO Kai-tao,LIU Ji-ping,DUO Ying-xian and YUAN Xiang-jiang.Application of High-Order Accurate Scheme in DNS[J].Journal of Aerospace Power,2006,21(1):1-6. |
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| Authors: | XIAO Kai-tao LIU Ji-ping DUO Ying-xian and YUAN Xiang-jiang |
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| Institution: | 1.School of Mechatronic Engineering, Beijing Institute of Technology, Beijing 100081, China2.Research Institute of Chemical Defense, Beijing 102205, China3.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China4.National Laboratory of CFD, Beijing 100083, China |
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| Abstract: | The influence of the different finite difference schemes on the transmission of T-S waves in flat plate boundary layers and free shear flow was studied.The results show that if 2nd order scheme is used,the T-S waves always decay in the flat plate boundary layer.Although the T-S wave grows in the free shear flow,no three dimensional structures appear.If high order scheme is used,the T-S wave grows in the plate boundary layer.The results obtained by DNS agree well with linear stability theory.In the free shear layer,not only the T-S wave grows quickly in the free shear flow,but also three dimensional waves appears evidently and three dimensional structures are excited. |
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| Keywords: | aerospace propulsion system high-order scheme boundary layer free shear layer |
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