Interferometric Studies of the Flow in Fast-Expanding Nozzles

Interferometric Studies of the Flow in Fast-Expanding Nozzles

Interferometric studies have been performed in the test section of the Naval Ordnance Laboratory (NOL) 127 mm shock tunnel under conditions that closely simulate the flow in a gas dynamic laser (GDL) cavity. A Mach-Zehnder interferometer has been used to determine the density distribution in two noz...

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Bibliographische Detailangaben
Hauptverfasser: Leverance,Robert A, Zimet,Elihu, Winkler,Eva M
Format: Report
Sprache:eng
Schlagworte:
ARGON
DEFLECTION
DENSITY
FLOW FIELDS
Fluid Mechanics
GAS DYNAMICS
GAS LASERS
HYPERVELOCITY WIND TUNNELS
INTERFEROMETERS
LASERS
Lasers and Masers
NOZZLE GAS FLOW
NOZZLES
PHOTOGRAPHY
SHOCK TUBES
SHOCK WAVES
STATISTICAL DISTRIBUTIONS
TEST METHODS
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Beschreibung
Zusammenfassung:Interferometric studies have been performed in the test section of the Naval Ordnance Laboratory (NOL) 127 mm shock tunnel under conditions that closely simulate the flow in a gas dynamic laser (GDL) cavity. A Mach-Zehnder interferometer has been used to determine the density distribution in two nozzle configurations. In a two-dimensional fast-expanding nozzle, time-resolved interferograms were obtained at 200 microsecond intervals. For a multiple nozzle module interferograms were obtained in two mutually perpendicular directions. The experimental setup is described and the results are discussed. (Author)