| 对层流边界层稳定性与转捩的实验研究 |
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| 引用本文： | 周明德.对层流边界层稳定性与转捩的实验研究[J].空气动力学学报,1988(2). |
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| 作者姓名： | 周明德 |
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| 作者单位： | 南京航空学院空气动力研究所 |
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| 摘 要： | 本文用可控热脉冲输入临界层的方法研究了平板层流边界层的稳定性与转捩。主要结果说明在扰动增长的初始阶段,即使有三元扰动分量的存在,二元线性理论仍适用。研究还表明次谐波转捩出现在较低的起始扰动水平或较低的雷诺数,所以不论对人工转捩或转捩抑制都是值得注意的现象。
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| 关 键 词： | 转捩 热脉冲 临界层 次谐波 层流边界层 |
AN EXPERIMENTAL STUDY ON THE LAMINAR BOUNDARY LAYER INSTABILITY AND TRANSITION |
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| Zhou Mingde.AN EXPERIMENTAL STUDY ON THE LAMINAR BOUNDARY LAYER INSTABILITY AND TRANSITION[J].Acta Aerodynamica Sinica,1988(2). |
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| Authors: | Zhou Mingde |
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| Institution: | Nanjing Aeronautical Institute |
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| Abstract: | An experimental study on the laminar boundary layer instability and transition was carried out in a flat-plate boundary layer by means of controllable heat pulsing introduced into the critical layer.The main results showed that the two-dimensional linear theory worked well in the initial period of disturbance amplification even if there existed considerable three dimensional components of disturbances.Moreover,the subharmonic routes to transition start from lower fluctuation levels of initial disturbances or from lower Reynold numbers,so are worth noting in artificial transition and active control of transition. |
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| Keywords: | transition heat pulsing critical layer subharmonic laminar boundary layer |
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