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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (2): 124998.doi: 10.7527/S1000-6893.2020.24998

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Effect of dihedral wings on hypersonic performance of double swept waverider

MENG Xufei, BAI Peng, LI Dun, WANG Rong, LIU Chuanzhen   

  1. China Academy of Aerospace Aerodynamics, Beijing 100074, China
  • Received:2020-11-26 Revised:2020-12-07 Published:2021-01-08
  • Supported by:
    National Natural Science Foundation of China (11672281)

Abstract: The waverider design with a given 3D leading edge is developed from the osculating-cone treatment, and customizing the leading edge curves generates double swept waveriders with dihedral and anhedral wings. Using CFD techniques, we evaluated the hypersonic performance of the waveriders, and studied the effect of the wing with positive and negative dihedral angles, namely, wing dihedral and wing anhedral, on stability. Results show that the wing dihedral exerted nearly no influence on the "wave-riding" performance, and hence a high lift-to-drag ratio was maintained in the hypersonic state. The wing dihedral decreased the longitudinal stability, while wing anhedral improved it; the former raised the lateral stability, while the latter lowered it; both improved the directional stability, and the effect of the former was stronger; the dynamic directional stability of the waveriders can be clearly improved by the wing dihedral, whereas the improvement by the wing anhedral decreased as the angle of attack increased.

Key words: waverider, double swept, dihedral wing, hypersonic, lateral-directional stability

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