| 非定常自由来流对静态三角翼气动特性的影响 |
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| 引用本文： | 史志伟,明晓.非定常自由来流对静态三角翼气动特性的影响[J].空气动力学学报,2009,27(4). |
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| 作者姓名： | 史志伟 明晓 |
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| 作者单位： | 南京航空航天大学航空宇航学院,江苏,南京,210016 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目 |
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| 摘 要： | 在南航非定常风洞中,运用动态测力、测压和流动显示技术,详细研究了非定常自由来流对静态三角翼气动特性的影响和三角翼背风面空间流场结构的变化.研究结果表明,在不同攻角下,随来流速度的脉动三角翼气动特性产生的变化不同.非定常自由来流对静态三角翼气动特性产生的影响,主要是由于来流风速的变化对三角翼上翼面的流动结构产生的影响所造成,特别是在静态失速攻角前后,这种影响最为明显,它使原先翼面上的破碎涡流变成了集中涡流.
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| 关 键 词： | 非定常风洞 非定常自由来流 三角翼 前缘涡 |
The effects of unsteady free stream on aerodynamic characteristics of a static delta wing |
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| SHI Zhi-wei,MING Xiao.The effects of unsteady free stream on aerodynamic characteristics of a static delta wing[J].Acta Aerodynamica Sinica,2009,27(4). |
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| Authors: | SHI Zhi-wei MING Xiao |
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| Institution: | College of Aerospace Engineering;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China |
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| Abstract: | The responses of a static delta wing in unsteady free stream were investigated in the unsteady wind tunnel of NUAA,through the measurements of dynamic forces,the dynamic pressure distribution and flow visualization.It was found that the aerodynamic characteristics variety of a delta wing in the oscillating free stream were different at different angle of attacks.The main reason is that the flow field structures of delta wing are altered by the oscillating free-stream and the vortex strength is changed.These... |
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| Keywords: | unsteady wind tunnel unsteady free stream delta wing leading-edge vortex |
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