| 细长体大迎角无侧滑时涡系不对称的机理研究 |
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| 引用本文： | 汪子兴,苏玳.细长体大迎角无侧滑时涡系不对称的机理研究[J].空气动力学学报,1988(1). |
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| 作者姓名： | 汪子兴 苏玳 |
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| 作者单位： | 南京航空学院
(汪子兴)，华东工学院(苏玳) |
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| 摘 要： | 本文介绍了细长体大迎角无侧滑时不对称涡系形成机理的初步探索结果。实验研究表明,不对称涡系的形成机理是:脱体涡受物面和位流边界影响,随着迎角增大,其强度和尺寸亦逐渐增加;当背风区宽度已不能容其自由发展时,左右两侧脱体涡便互相推挤,致使较弱的脱体涡被上推,形成了不对称的涡迹。 实验研究还表明不对称性的偶然性和必然性之间的辩证关系。对脱体涡在受到扰动和逆压后的情况亦作了相应的研究。所有实验是在常规低速风洞中进行的,实验雷诺数Re≈1×10~5。
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| 关 键 词： | 旋涡流动 空间涡系 大迎角空气动力学 细长体 |
THE FORMATION MECHANISM OF THE ASYMMETRIC SPATIAL VORTEX OF SLENDER BODIES AT HIGH ANGLE OF ATTACK |
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| Wang Zixing.THE FORMATION MECHANISM OF THE ASYMMETRIC SPATIAL VORTEX OF SLENDER BODIES AT HIGH ANGLE OF ATTACK[J].Acta Aerodynamica Sinica,1988(1). |
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| Authors: | Wang Zixing |
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| Institution: | Wang Zixing(Nanjing Aeronautical institute)Su Dai(East China institute of Technology) |
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| Abstract: | The method of the flourescent mini-tuft has been used to investigate the FORMATION MECHANISM of the asymmetric spatial vortex of slender bodies at high angle of attack in low speed tunnel without sideslip.This investigation clearly shows the formation mechanism of the asymmetric spatial vortex.The strength and size of vortex are increased with the increment of angle of attack.When the width of leeside is not enough for the development of both side vortex,the weak vortex is pushed upward by the strong vortex.This investigation also shows the occasional and inevitable features of asymmetric vortex.The effect of turbulence and adverse pressure are also be considered. |
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| Keywords: | vortex flow spatial vortex aerodynamics at high angle of attack slender body |
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