Influence of gap parameters on aerodynamics of multi-element airfoil
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摘要: 数值模拟研究缝道参数对着陆构型多段翼型气动性能的影响,采用有限体积法求解雷诺平均N-S(Navier-Stokes)方程,湍流模型采用S-A(Spalart-Allmaras)模型,给出了多段翼型升力系数与表面压力系数随各缝道参数的变化规律.计算结果表明:采用的计算模型可用于二维多段翼型的计算;缝道参数对多段翼型气动性能的影响显著,在各个缝道参数的变化范围内升力系数均存在最优值,适当的缝道参数可以抑制后翼上表面逆压梯度,消除后翼分离,并保持前翼尾迹不与后翼边界层相掺混,提高多段翼型的气动性能.Abstract: The effect of flap and slat riggings on the multi-element airfoil was investigated numerically. The compressible Navier-Stokes equations were solved by the finite-volume method. Spalart-Allmaras (S-A) turbulence model was used. The effects of flap and slat riggings on lift coefficients and pressure coefficients were provided. The validation of computation agreed well with the experimental results. The computations on the effect of flap and slat riggings shows that lift coefficient has an optimum with every design parameter. With proper flap and slat riggings, the adverse pressure gradient and the separation on the backward wing section could be suppressed, and the wake from forward wing section does not mix with the boundary layer of backward wing section. So the performance of the airfoil can be improved.
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Key words:
- numerical simulation /
- multi-element airfoil /
- gap parameter /
- aerodynamic character
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