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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (2): 451-460.doi: 10.7527/S1000-6893.2015.0121

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Numerical simulation of transonic airfoil buffet suppression with slotted cavity

ZHOU Wei1, ZHANG Zhengke1, QU Ke2, ZHAI Qi1   

  1. 1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
    2. Department of Civil Engineering, City College, The City University of New York, New York NY 10031, USA
  • Received:2015-03-01 Revised:2015-05-04 Online:2016-02-15 Published:2015-05-12
  • Supported by:

    The Preliminary Research Fund of the General Reserve Department of PLA(9140C420301110C42)

Abstract:

The unsteady Reynolds average Navier-Stokes(URANS) method is used to compute the transonic buffet, the shock oscillations and the evolution of flow structures of 18% thick biconvex circular-arc airfoil. The suppression effects of passive control with different configurations on transonic airfoil buffet are investigated by numerical method. The computational results reveal that the self-sustained shock oscillation on 18% thick biconvex circular-arc airfoil at transonic speeds has only forward motion without noticeable backward motion. A cavity with ventilating slots, as a passive control measure, can alleviate transonic buffet, but has little influence on the buffet frequency. Deeper cavity has greater effect of suppression but the variation of the cavity depth does not influence the buffet frequency. The suppression effects between 2-slot, 3-slot and 4-slot cavities are insignificant and the number of slots has little influence on the buffet frequency.

Key words: transonic, buffet, shock oscillation, cavity, suppression

CLC Number: