Title: Freestream Velocity in a Shock-Tunnel Nozzle Flow using Diode Laser Absorption Spectroscopy
Abstract:Diode laser absorption spectroscopy has been
used to make time-resolved velocity
measurements in the freestream of a large free piston
shock tunnel. A small probe was used to
sample a uniform regi...Diode laser absorption spectroscopy has been
used to make time-resolved velocity
measurements in the freestream of a large free piston
shock tunnel. A small probe was used to
sample a uniform region of the flow at the nozzle
exit. Experiments were conducted with air and
nitrogen test gases, however, only the nitrogen
case produced velocity measurements during the
shock-tunnel test time. Rubidium was seeded
into the flow and employed as the probe species.
The results are consistent with chemical
reactions reducing the concentration of atomic
Rb in the freestream and increasing it in the
high-temperature boundary layers formed on the
probe during flow establishment.Read More
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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