As climate change is exacerbated and existing resources are depleted, the need for
sustainable industries becomes ever so important. Aviation is not an exception. Despite the …

When the pressure fluctuations caused by turbulence vorticity in the boundary layer are
scattered by a sharp trailing edge, acoustic energy is generated and propagated to the far …

Insects, birds, and bats that power and control flight by flapping their wings perform excellent
flight stability and maneuverability by rapidly and continuously varying their wing motions …

We are now at a point where airframes, aeroengines and their integration require radical
changes to meet increasingly aggressive environmental targets. Generally, fan noise …

The swimming of aquatic animals and flying of insects and birds have fascinated physicists
and biologists for more than a century. In this regard, great efforts have been made to …

This paper conducts a theoretical investigation into the prediction of broadband trailing-edge
noise for rotating serrated blades. Lyu's semi-analytical noise prediction model for isolated …

Trailing-edge serrations inspired by owls are capable of reducing broadband noise. In this
study, the wall-resolved large-eddy simulations (LES) are carried out on the flow over NACA …

This study mainly focuses on the structural design, acoustic performance prediction, and
experimental validation of a novel composite sound absorber that is similar to the feather …

This paper focuses on the design and sound absorption analysis of Helmholtz resonators
with serrated necks inspired by the leading edges of owl wings. Numerical models for …

This study is inspired by the velvety structures on an owl's upper wing surface. Anechoic
wind tunnel experiments were conducted to study the effect of the velvety structures on …