| 超声速弹头凹型光学头罩流动显示研究 |
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| 引用本文： | 田立丰,易仕和,赵玉新,何霖,程忠宇.超声速弹头凹型光学头罩流动显示研究[J].气动实验与测量控制,2009(1):15-17. |
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| 作者姓名： | 田立丰 易仕和 赵玉新 何霖 程忠宇 |
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| 作者单位： | 国防科学技术大学航天与材料工程学院,长沙410073 |
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| 基金项目： | 基金项目：自然科学基金（100672178） |
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| 摘 要： | 在自行设计的Ma=3．8超声速风洞中，采用基于纳米技术的平面激光散射（NPLS）方法对超声速弹头凹型光学头罩流场进行了流动显示实验。高时空分辨率的NPLS图像再现了激波、膨胀波、边界层及尾迹等流场结构。观察到了边界层的产生、发展及转捩过程。通过对时间相关图像的分析，可以精确测定边界层内大尺度结构的几何特征和时间演化特征。
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| 关 键 词： | NPLS 高时空分辨率 湍流边界层 弹头模型 |
Flow visualization of supersonic flow around a concave optical bow cap model of warhead |
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| Authors: | TIAN Li-feng YI Shi-he ZHAO Yu-xin HE Lin CHENG Zhong-yu |
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| Institution: | ( College of Aerospace and Material Engineering, National Univ. of Defense Technology, Changsha 410073, China) |
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| Abstract: | Supersonic flow around a concave optical bow cap model of warhead was carried out in the Ma = 3.8 supersonic wind tunnel by Nano-based Planar Laser Scattering （NPLS） method. NPLS images at high spatiotemporal resolution reveal shockwave, expansion wave, boundary layer and wake in the flow. Generation, development and transition of boundary layer were also observed. By analyzing the temporal correlation of NPLS images, geometrical character and temporal evolution measured quantificationally. of large-scale structure of boundary layer can be |
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| Keywords: | NPLS high spatiotemporal resolution turbulent boundary layer warhead model |
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