Search
Now showing items 1-6 of 6
Bio-inspired canopies for the reduction of roughness noise
(ElsevierJournal of Sound and Vibration, 2016-12-22)
This work takes inspiration from the structure of the down covering the flight feathers of larger species of owls, which contributes to their ability to fly almost silently at frequencies above 1.6 kHz. Microscope photographs ...
A WKB approximation of elastic waves travelling on a shell of revolution
(ElsevierJournal of Sound and Vibration, 2016-08-04)
This paper is concerned with the elastic waveguide properties of an infinite pipe with circular cross section whose radius varies slowly along its length. The equations governing the elastodynamics of such shells are derived ...
Interaction of turbulence with the leading-edge stagnation point of a thin aerofoil
(Cambridge University PressJournal of Fluid Mechanics, 2016)
An asymptotic model is constructed to analyse the interaction of turbulence generated far upstream with a thin elliptic-nosed solid body in uniform flow. The leading-edge stagnation point causes significant deformation of ...
The Importance of the Unsteady Kutta Condition when Modelling Gust-Aerofoil Interaction
(ElsevierJournal of Sound and Vibration, 2016-06-01)
The Kutta condition is applied to aerofoils with sharp trailing edges to allow
for viscous effects to be considered within a simplified system of equations
that are inviscid. This paper discusses in detail the inclusion ...
Tunnelling effects for acoustic waves in slowly varying axisymmetric flow ducts
(ElsevierJournal of Sound and Vibration, 2016-06-22)
The multiple-scales Wentzel–Kramers–Brillouin (WKB) approximation is used to model the propagation of acoustic waves in an axisymmetric duct with a constriction in the presence of mean flow. An analysis of the reflection ...
Spectral study of the Laplace-Beltrami operator arising in the problem of acoustic wave scattering by a quarter-plane
(Oxford University PressQuarterly Journal of Mechanics and Applied Mathematics, 2016)
The Laplace-Beltrami operator on a sphere with a cut arises when considering
the problem of wave scattering by a quarter-plane. Recent methods developed
for sound-soft (Dirichlet) and sound-hard (Neumann) quarter-planes ...