Journal ArticleDOI
Characterization of arcjet flows using laser-induced fluorescence
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TLDR
A sensor based on laser-induced fluorescence has been installed at the 20MW NASA Ames Aerodynamic Heating Facility as discussed by the authors, which provides new, quantitative, real-time information about properties of the arcjet flow in the highly dissociated, partially ionized, nonequilibrium regime.Abstract:
A sensor based on laser-induced fluorescence has been installed at the 20-MW NASA Ames Aerodynamic Heating Facility. The sensor has provided new, quantitative, real-time information about properties of the arcjet flow in the highly dissociated, partially ionized, nonequilibrium regime. Number densities of atomic oxygen, flow velocities, heavy particle translational temperatures, and collisional quenching rates have been measured. These results have been used to test and refine computational models of the arcjet flow. The calculated number densities, translational temperatures, and flow velocities are in moderately good agreement with experimentread more
Citations
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Journal ArticleDOI
Arcjet flow properties determined from laser-induced fluorescence of atomic nitrogen
TL;DR: In this article, the flow properties, which include velocity, translational temperature, and N concentration, were measured simultaneously over a range of facility operating conditions for N2-argon test gas flows in the 30 cm-diameter nozzle.
Proceedings ArticleDOI
Characterization of supersonic and subsonic plasma flows
Doug Fletcher,Mickaël Playez +1 more
TL;DR: In this paper, the authors compare the performance of constricted arc and inductively coupled plasmatron (ICP) and constricted-arc heated and ICP plasma facilities from the perspective of thermal simulation for stagnation point heat transfer and for plasma stream characterization.
Journal ArticleDOI
Nonintrusive measurements for high-speed, supersonic, and hypersonic flows
TL;DR: In this paper, the collective light scattering method is used for diagnostics of turbulent flows at supersonic and hypersonic regimes, and the experimental results obtained by this method in a mixing layer are illustrated.
Proceedings ArticleDOI
Arcjet flow characterization using laser-induced fluorescence of atomic species
TL;DR: In this article, the centerline enthalpy and its apportionment into temperature, thermal, and chemical contributions were determined from recent experimental measurements in the Aerodynamic Heat- ing Facility (AHF) Arcjet at NASA Ames Research Center.
Proceedings ArticleDOI
Arcjet flow properties determined from laser-induced fluorescence of atomic nitrogen
TL;DR: Flow property measurements that were recently acquired in the Ames Research Center Aerodynamic Heating Facility arcjet using two-photon laser-induced fluorescence of atomic nitrogen (N) are reported, which yields the total free-stream flow enthalpy.
References
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Book
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Journal ArticleDOI
Laser-Induced Fluorescence
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Journal ArticleDOI
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TL;DR: In this paper, the authors measured the cross section of the excited-state photoionization cross section for the 3p, 2p and 2p transition in atomic oxygen using two-photon excited fluorescence.