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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 3 — Jan. 20, 1998
  • pp: 486–495

Arcjet Nozzle Flow-Field Characterization by Laser-Induced Fluorescence

P. Victor Storm and Mark A. Cappelli  »View Author Affiliations


Applied Optics, Vol. 37, Issue 3, pp. 486-495 (1998)
http://dx.doi.org/10.1364/AO.37.000486


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Abstract

Laser-induced fluorescence of the Balmer–alpha (H<sub>α</sub>) transition of atomic hydrogen was performed within the nozzle of a 1-kW class radiatively cooled arcjet thruster operating on hydrogen and synthesized-hydrazine propellants. Axial velocities were determined from the Doppler shift of the H<sub>α</sub> line center relative to a stationary reference, whereas translational temperatures and electron number densities were determined from a line-shape analysis of the H<sub>α</sub> transition. The results are compared with a numerical model and indicate excellent agreement with the velocities, as well as temperatures near the nozzle exit. There are discrepancies, however, in the temperatures far upstream of the exit and in the electron densities, suggesting needed improvements in the modeling of the recombination chemistry.

© 1998 Optical Society of America

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.6580) Atomic and molecular physics : Stark effect
(300.2530) Spectroscopy : Fluorescence, laser-induced

Citation
P. Victor Storm and Mark A. Cappelli, "Arcjet Nozzle Flow-Field Characterization by Laser-Induced Fluorescence," Appl. Opt. 37, 486-495 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-3-486


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References

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