| 超声速混合层转捩过程实验研究的进展 |
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| 引用本文： | 易仕和,赵玉新,田立丰,何霖,程忠宇.超声速混合层转捩过程实验研究的进展[J].空气动力学学报,2009,27(Z1). |
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| 作者姓名： | 易仕和 赵玉新 田立丰 何霖 程忠宇 |
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| 作者单位： | 国防科技大学航天与材料工程学院,湖南,长沙,410073 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 超声速湍流机理的实验研究是一件十分困难的工作.在2000年以来,本研究小组在低噪声超声速混合层风洞研究、超声速流动精细结构测量技术研究方面取得了重要进展,这给超声速混合层湍流精细结构的研究奠定了基础.为了研究超声速混合层及其气动光学问题,在研制的超声速混合层风洞中,主要以基于纳米技术的平面激光散射技术(Nano-trace Planar Laser Scattering,简称NPLS)为基础,研究了几种对流马赫数的超声速混合层从层流到湍流转捩过程K-H不稳定涡的空间结构,以及K-H不稳定涡的空间结构随着时间的发展过程.实验结果清晰地反映了湍流混合的不稳定性与转捩的精细结构,以及转捩过程的展向精细结构.
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| 关 键 词： | 混合层 不稳定性 转捩 |
Recent advances of experimental study of supersonic mixing layer transition |
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| YI Shi-he,ZHAO Yu-xin,TIAN Li-feng,HE Lin,CHENG Zhong-yu.Recent advances of experimental study of supersonic mixing layer transition[J].Acta Aerodynamica Sinica,2009,27(Z1). |
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| Authors: | YI Shi-he ZHAO Yu-xin TIAN Li-feng HE Lin CHENG Zhong-yu |
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| Abstract: | Experimental study of supersonic turbulence mechanics is a very hard work.Some significant advances of low noise supersonic mixing layer tunnel and fine structure of supersonic flow have been obtained from 2000,and these works will help the study of the fine structure of supersonic mixing layer turbulence.To study supersonic mixing layer and its optical performance,we studied the K-H instable vortexes of the transition of supersonic mixing layer at several Mcs,and its temporal evolution based on NPLS(Nano-trace Planar Laser Scattering).The results reveal instability of the turbulent mixing,and streamwise and spanwise fine structure of transition. |
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| Keywords: | NPLS mixing layer NPLS instability transition |
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