| CFD中数值耗散和延伸边界对声传播的影响 |
| |
| 引用本文： | 赵磊,乔渭阳. CFD中数值耗散和延伸边界对声传播的影响[J]. 航空动力学报, 2010, 25(12): 2716-2720 |
| |
| 作者姓名： | 赵磊 乔渭阳 |
| |
| 作者单位： | 西北工业大学动力与能源学院,西安,710072;西北工业大学动力与能源学院,西安,710072 |
| |
| 摘 要： | 对已知色散关系的正弦波在二维管道中的传播使用有限体积法进行计算,结果表明二阶精度下每波长40个左右的网格点能够有效地保留声波.在计算域外增加稀疏网格延伸段能够对边界反射起到抑制作用,为以较小的计算量增加实现较好的反射抑制效果,研究给出了延伸段长度和网格轴向尺寸的推荐公式.
|
| 关 键 词： | 叶轮机噪声 数值耗散 边界反射 延伸网格 计算流体动力学 |
| 收稿时间： | 2009-11-16 |
| 修稿时间： | 2010-05-12 |
Effect of numerical dissipation and extended-grid on sound propagation in computational fluid dynamics |
| |
| ZHAO Lei and QIAO Wei-yang. Effect of numerical dissipation and extended-grid on sound propagation in computational fluid dynamics[J]. Journal of Aerospace Power, 2010, 25(12): 2716-2720 |
| |
| Authors: | ZHAO Lei and QIAO Wei-yang |
| |
| Affiliation: | School of Power and Energy, Northwestern Polytechnical University,Xian 710072,China |
| |
| Abstract: | A sinusoidal acoustic wave with known dispersion-relation was propagated through a two-dimensional duct using a finite-volume scheme,showing that a rough estimate of around 40 points per wavelength under second order accuracy was sufficient to preserve the wave.Adding an extended coarse grid out of the computational region could reduce the unwanted boundary reflection.A guideline of the extended- grids length and axial size for the good effect of absorbing the boundary reflection with less computation was provided. |
| |
| Keywords: | Turbomachinery noise Numerical dissipation CFD boundary reflection extended-grid |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
