Empirical Modeling of Copper Catalysis for Enthalpy Determination in Plasma Facilities

Viladegut, Alan; Chazot, Olivier

doi:10.2514/1.t5683

Cited by 7 publications

(1 citation statement)

References 23 publications

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“…Pressure in the test chamber (p c ) is measured by an absolute pressure transducer (Membranovac DM 12, Leybold Vacuum). Characterization of the plasma flow conditions is performed by means of intrusive measurements of stagnation point heat flux ( qcw ) over a reference catalytic surface and jet dynamic pressure (p dyn ) through a Pitot probe [38]. A spectrograph records locally-resolved emission spectra to measure temperature profiles across the plasma jet and rebuild the flow enthalpy at the boundary layer (BL) edge (h e ), under the assumption of local thermodynamic equilibrium [39].…”

Section: The Vki Plasmatron Facilitymentioning

confidence: 99%

3D infrared temperature maps measurements of ablative materials during plasma wind tunnel experiments

Fagnani¹,

Helber²,

Hubin³

et al. 2023

Meas. Sci. Technol.

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Accurate surface temperature and recession measurements are crucial experimental data for plasma wind tunnel testing of ablative thermal protection materials. In this work we propose a novel methodology to reconstruct infrared temperature maps on 3D geometries undergoing surface recession. An optical calibration technique is used to extract 3D metric information from the 2D thermal images, thanks to a specific calibration target with control points. The evolution of the sample shape during the experiment is tracked from a side view, using a visual-range camera with dedicated image processing, and reconstructed in 3D under the assumption of axisymmetry. The surface temperature is projected on the time-varying 3D geometry from the calibrated thermograms. The technique is demonstrated on a graphite ablation experiment in air plasma. The reconstructed maps provide detailed multidimensional information about the transient temperature evolution, overcoming traditional approaches that are limited around the stagnation point. The technique allows to study ablation mechanisms with further detail, improving experimental data for material qualification and validation of simulation codes.

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Section: The Vki Plasmatron Facilitymentioning

confidence: 99%