Title :
A laser fluorescence anemometer system for the Langley 16- by 24-inch water tunnel
Author :
Owen, F. Kevin ; Orngard, Gary M. ; Neuhart, Dan H.
Author_Institution :
Complerte Inc., Palo Alto, CA, USA
Abstract :
A laser fluorescence anemometer which comprises a three-component laser Doppler velocimeter system with a fourth channel to measure fluorescent dye concentration has been installed in the NASA Langley 16- by 24-in water tunnel. The system includes custom designed optics, data acquisition, and traverse control instruments and a custom software package. Feasibility studies demonstrated how water tunnels can be used in conjunction with advanced optical techniques to provide nonintrusive detailed flow field measurements of complex fluid flows with a minimum of expense. The measurements show that the laser fluorescence anemometer can provide new insight into the structure, entrainment, control and of mixing vortical and shear layer flows
Keywords :
Doppler effect; aerospace test facilities; anemometers; flow simulation; flow visualisation; fluorescence; laser velocimeters; shear flow; vortices; 16 inch; 24 inch; Langley; NASA; custom designed optics; custom software package; data acquisition; fluorescent dye concentration; laser fluorescence anemometer; nonintrusive detailed flow field measurements; shear layer flows; three-component laser Doppler velocimeter; traverse control instruments; viscous inviscid interactions; vortical layer flow; water tunnel; Control systems; Data acquisition; Fluid flow control; Fluid flow measurement; Fluorescence; Instruments; NASA; Optical control; Optical design; Optical mixing;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on
Conference_Location :
Rockville, MD
DOI :
10.1109/ICIASF.1991.186264
