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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (7): 38-50.doi: 10.7527/S1000-6893.2022.26990

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

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)

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

CLC Number: