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

fYear

1991

fDate

27-31 Oct 1991

Firstpage

403

Lastpage

412

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on

Conference_Location

Rockville, MD

Type

conf

DOI

10.1109/ICIASF.1991.186264

Filename

186264