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Prof. Nigel Peake Derpartment Of Applied Mathematics and Theoretical Physics, University of cambridge
RESUMEN
When they are hunting many, but not all, species of owl manage to fly almost silently in the audible frequency range of both themselves
and their prey. A complete understanding of how this is done has yet to be found, but it is believed that three rather unusual features
of the owl wing and feathers play a significant role. These features include a leading-edge comb of barbs, a porous and flexible trailing edge brush, and a particularly unusual microstructure in the feathers which leads to a velvet-like wing suction surface. Although
the first feature is found on other raptors, the second two are quite unique to owls which hunt in acoustic stealth. In this talk,
I will describe a range of theoretical and experimental research which has been conducted to attempt to understand these mechanisms.
It is well-known in other contexts, including aircraft landing noise and wind turbines, that a turbulent boundary layer passing over a wing trailing edge is a potentially potent source of noise, and so a particular focus of our work has been to investigate the ways
in which the owl's adaptations may have weakened this noise mechanism. An owl-inspired trailing-edge noise control device will be described. I will also describe theoretical mathematical modelling using the Wiener-Hopf technique.
SEMBLANZA
Nigel Peake ha sido Director de la Escuela de las Ciencias Físicas de la Universidad de Cambridge desde 2020, y previamente
fue Director del Departamento de Matemáticas Aplicadas y Física Teórica (DAMTP) de la misma universidad.
Es profesor de Matemáticas Aplicadas desde el 2003, y sus líneas de investigación incluyen el sonido, la vibración,
y la estabilidad hidrodinámica, con una buena parte de su trabajo elaborada en colaboración con la industria.
Es Fellow de Emmanuel College, Cambridge.
