ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Numerical simulation of transonic airfoil buffet suppression with slotted cavity
Received date: 2015-03-01
Revised date: 2015-05-04
Online published: 2015-05-12
Supported by
The Preliminary Research Fund of the General Reserve Department of PLA(9140C420301110C42)
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
ZHOU Wei , ZHANG Zhengke , QU Ke , ZHAI Qi . Numerical simulation of transonic airfoil buffet suppression with slotted cavity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(2) : 451 -460 . DOI: 10.7527/S1000-6893.2015.0121
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