Title :
Spatially-resolved velocity profile measurements by means of a two-wavelength technique
Author :
Buttner, L. ; Czarske, Jurgen ; Razik, Thorsten
Author_Institution :
Laser Zentrum Hannover eV, Germany
Abstract :
A measuring system based on a differential laser-Doppler anemometer has been extended to determine one-dimensional velocity profiles of shear flows with a spatial resolution in the micrometer range. The principle of the realised velocity profile sensor is based on two-wavelength fringe systems with different gradients of their fringe spacings. After wavelength-sensitive detection two Doppler frequencies are determined, which yield the position as well as the velocity component of individual tracer particles.
Keywords :
flow measurement; laser Doppler anemometry; laser velocimetry; light interferometry; optical sensors; shear flow; velocity measurement; Doppler frequencies; fringe spacings; laser-Doppler anemometer; shear flows; spatial resolution; tracer particles; two-wavelength fringe systems; velocity profile measurement; velocity profile sensor; wavelength-sensitive detection; Frequency; Interference; Laser beams; Linear discriminant analysis; Optical scattering; Particle measurements; Spatial resolution; Velocity measurement; Volume measurement; Wavelength measurement;
Conference_Titel :
Lasers and Electro-Optics, 2003. CLEO '03. Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-748-2
