航空学报 > 2023, Vol. 44 Issue (7): 38-50   doi: 10.7527/S1000-6893.2022.26990

宽速域翼尖涡及其与斜激波相互作用

马印锴, 李祝飞(), 黄琪, 杨基明   

  1. 中国科学技术大学 近代力学系,合肥 230026
  • 收稿日期:2022-01-24 修回日期:2022-02-10 接受日期:2022-03-04 出版日期:2023-04-15 发布日期:2022-03-11
  • 通讯作者: 李祝飞 E-mail:lizhufei@ustc.edu.cn
  • 基金资助:
    国家自然科学基金(12172354)

Wingtip vortex and its interaction with oblique shock wave in wide-speed range

Yinkai MA, Zhufei LI(), Qi HUANG, Jiming YANG   

  1. Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China
  • Received:2022-01-24 Revised:2022-02-10 Accepted:2022-03-04 Online:2023-04-15 Published:2022-03-11
  • Contact: Zhufei LI E-mail:lizhufei@ustc.edu.cn
  • Supported by:
    National Natural Science Foundation of China(12172354)

摘要:

针对宽速域飞行器产生的翼尖涡及其与斜激波相互作用问题,采用数值模拟方法,在来流马赫数0.2~6.0范围内,研究了翼尖涡的演化特性,并探讨了斜激波诱导翼尖涡破碎的机理。结果表明,在宽速域范围,翼尖涡的切向速度和环量分布仍然符合低速流动中的自相似关系式;在超声速至高超声速流动中,翼尖涡强度沿流向更快地减弱;当翼尖涡与斜激波相互作用时,涡核处压力越低的翼尖涡更容易破碎,而经典的涡破碎理论难以在宽速域范围内准确预测涡破碎现象;通过引入涡核处的压力亏损效应修正经典理论,大幅提升了预测斜激波诱导翼尖涡破碎的能力。

关键词: 宽速域, 飞行器, 翼尖涡, 斜激波, 涡破碎

Abstract:

Wingtip vortex generated by a wide-speed range flight vehicle and its interaction with oblique shock wave are numerically investigated in a freestream Mach number range of 0.2-6.0. The evolution characteristics of the wingtip vortex are examined and the mechanism of its breakdown induced by the oblique shock wave are revealed. The results show that the tangential velocity and circulation distribution of the wingtip vortex in the wide-speed range still conform to the self-similarity relation in the low-speed flow. In supersonic and hypersonic flow regimes, the intensity of the wingtip vortex decreases more obviously along the flow direction. When the wingtip vortex with a lower pressure at the vortex core interacts with the oblique shock wave, the vortex is easier to break down. However, the existing theories are difficult to accurately predict the vortex breakdown in the wide-speed range. When the classic theory is modified by considering the pressure deficit at the vortex core, the ability to predict the vortex breakdown induced by the oblique shock wave is greatly improved.

Key words: wide-speed range, flight vehicle, wingtip vortex, oblique shock wave, vortex breakdown

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