| 李佳.自由来流中展向速度对流动稳定性的影响[J].唐山学院学报,2020,33(3):1-5 |
| 自由来流中展向速度对流动稳定性的影响 |
| Influence of Spanwise Velocity on Flow Stability in Free Flow |
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| DOI：10.16160/j.cnki.tsxyxb.2020.03.001 |
| 中文关键词: 空间模式 平板边界层 线性稳定性 展向速度 |
| 英文关键词: spatial model plate boundary layer linear stability spanwise velocity |
| 基金项目:唐山市科技计划项目（18130222a）；唐山学院博士创新基金项目（tsxybc201305） |
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| 中文摘要: |
| 采用线性稳定性理论研究了三维平板边界层中展向来流速度对流动稳定性的影响。在基本流中给出了展向速度的大小，从特征值、特征函数和扰动波的增长幅值上显示不同展向来流速度的计算结果，并和无展向来流速度的二维边界层进行比较，结果表明，展向速度对边界层内的扰动起着不稳定的作用，且展向速度越大稳定性越差。 |
| 英文摘要: |
| In this paper, the linear stability theory is adopted to study the influence of spanwise velocity on the flow stability in the three-dimensional plate boundary layer. The spanwise velocity is offered in the basic flow and the calculated results of different spanwise are shown in the growth amplitude of the eigenvalue, characteristic function and disturbance wave. Additionally, the calculation is compared with the two-dimensional boundary layer without spanwise velocity. The results show that the spanwise velocity has a unstable influence on the disturbance in boundary layers and the stability becomes poorer with the velocity increasing. |
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