Development of a Quiet Aerofoil with Adaptive Porous Edges

在成功地尝试模仿自然界使用的流量控制之后，创新的新流量控制诞生了。猫头鹰长期以来一直是减少机翼噪声的一个令人兴奋的研究主题。在这种情况下，它们羽毛的多孔性(允许空气阻力通过翅膀的质量)有助于抑制噪音[6，7]。如果能够在不损害翼型气动性能的情况下利用这种噪声抑制，它将具有重要的工业意义。翼型的气孔处理是一个很有前途的研究课题，但在当前的研究中仍然有许多空白，本博士致力于填补目前研究中的空白：气动和气动声学性能，气孔率/渗透率的适应性，翼型前缘和尾缘的气孔

Following successful attempts to mimic flow controls employed by nature, innovative new flow controls were born. Owls have long been an exciting topic of research for reducing aerofoil noise. In this case, their feathers' porosity (the quality that allows air to pass resistively through the wings) helps in suppressing noise [6,7]. If this noise suppression could be harnessed without a detrimental effect to the aerodynamic performance of aerofoil, it would have significant industrial implications.Porous treatment on aerofoil is a promising research topic, but there are still many gaps in the current research which this PhD aims to fill:The Aerodynamic and Aero-acoustics PerformancesThe Adaptability of Porosity/PermeabilityPorosity at both the Leading and Trailing Edge of the aerofoil