类鸟翼型的粒子成像测速（PIV）研究

The objective of this project is to study the aerodynamics around a birdlike airfoil. The
variables to investigate are the turbulent shear stress and the pressure distribution. With
this aim, two experiments were carried out in the LNB wind tunnel.
The seagull hand pinion inspired the SG04 birdlike airfoil considered for this work. A
flapping flight motion apparatus was used to force this wing heaving and pitching.
First, an experiment to capture the boundary layer and determine the shear stress was
done. Therefore, very accurate measurements with stereoscopic Particle Image
Velocimetry technique were required. This exercise was performed with a flexible and
non-flexible SG04 wing.
Moreover, with the same method, a second experiment tried to capture a larger flow field
around the whole flexible flapping SG04 airfoil, in order to determine the pressure
distribution.
To begin with, a theoretical background highlighting the most important features of moving
airfoils and Particle Image Velocimetry is presented. The experimental setup, recording,
data processing and results of both experiments conclude the second part of this work. 德国LaVision PIV/PLIF粒子成像测速场仪