Title :
Doppler global velocimetry: accuracy tests in a wind tunnel
Author :
Lempereur, Christine ; Barricau, Philippe ; Mathe, Jean-michel ; Mignosi, André
Author_Institution :
ONERA, Toulouse, France
fDate :
6/21/1905 12:00:00 AM
Abstract :
A one-component Doppler Global Velocimeter has been designed and tested in an empty wind tunnel generating a perfectly calibrated flow. Most of the technical choices involving light sheet generation, optical components, cameras, iodine cell, are described and argued, as well as geometrical calibration and processing steps. A specific device has been developed, but not yet described, to relax constraints on the stabilization of laser frequency and iodine cell temperature. Velocity maps obtained by this D.G.V. system are compared to the known Mach number. These promising results show the interest of following such a procedure to qualify and optimize a prototype
Keywords :
Doppler measurement; calibration; laser frequency stability; laser velocimetry; wind tunnels; Doppler global velocimetry; I; Mach number; accuracy tests; calibrated flow; cameras; geometrical calibration; image processing; iodine cell; iodine cell temperature; laser frequency; optical components; prototype optimisation; stabilization; velocity maps; wind tunnel; Cameras; Equations; Frequency measurement; Laboratories; Light scattering; Optical scattering; Particle measurements; Prototypes; Testing; Velocity measurement;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1999. ICIASF 99. 18th International Congress on
Conference_Location :
Toulouse
Print_ISBN :
0-7803-5715-9
DOI :
10.1109/ICIASF.1999.827148
