Recent catalysis measurements at IRS

Massuti-Ballester, Bartomeu; Pidan, S.; Herdrich, Georg; Fertig, Markus

doi:10.1016/j.asr.2015.04.028

Cited by 35 publications

(14 citation statements)

References 24 publications

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“…Other efforts have been devoted to develop alternative methods using subtraction of the convective contribution, obtained from a correlation, from the total measured heat flux [16] or near-surface diagnostic techniques [17].…”

Section: Enthalpy Rebuilding and Catalytic Property Determinationmentioning

confidence: 99%

Quantification of uncertainty on the catalytic property of reusable thermal protection materials from high enthalpy experiments

Sanson

Villedieu

Panerai

et al. 2017

Experimental Thermal and Fluid Science

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An accurate determination of the catalytic property of thermal protection materials is crucial to design reusable atmospheric entry vehicles. This property is determined by combining experimental measurements and simulations of the reactive boundary layer near the material surface. The inductively-driven Plasmatron facility at the von Karman Institute for Fluid Dynamics provides a test environment to analyze gas-surface interactions under effective hypersonic conditions. In this study, we develop an uncertainty quantification methodology to rebuild values of the gas enthalpy and material catalytic property from Plasmatron experiments. A non-intrusive spectral projection method is coupled with an in-house boundarylayer solver, to propagate uncertainties and provide error bars on the rebuilt gas enthalpy and material catalytic property, as well as to determine which uncertainties have the largest contribution to the outputs of the experiments. We show * Corresponding author. that the uncertainties computed with the methodology developed are significantly reduced compared to those determined using a more conservative engineering approach adopted in the analysis of previous experimental campaigns.

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Section: Enthalpy Rebuilding and Catalytic Property Determinationmentioning

confidence: 99%

Quantification of uncertainty on the catalytic property of reusable thermal protection materials from high enthalpy experiments

Sanson

Villedieu

Panerai

et al. 2017

Experimental Thermal and Fluid Science

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“…Since parameter sets for catalysis modelling on SiC have already been published in the past [4,6], the CVD-SiC model calibration will be explained first. As a first step, published recombination coefficients [16,20,21] together with the new measurements (Sect. 3) have been compared with the current model calibration [6].…”

Section: Numerical Campaign 41 Cfd Model Calibrationmentioning

confidence: 99%

“…Fig. 5 Temperature and pressure dependency of the CVD-SiC oxygen recombination coefficient with old model calibration data [6] in comparison to the literature data (empty diamond [20], empty triangle [21], empty box [16]) and current measurements from L2K (filled diamond) and from PWK3 at 160 Pa (filled circle), 377 Pa (filled triangle) and 1060 Pa (filled inverted triangle) of oxygen partial pressures A similar observation as for oxygen recombination can be made for the nitrogen recombination shown in Fig. 6.…”

Section: Numerical Campaign 41 Cfd Model Calibrationmentioning

confidence: 99%

“…Automatic fitting routines are not well suited in this respect. The PWK3-measured recombination coefficients are used to anchor the calibrations, with the L2K recombination coefficients, pre-existing PWK3 data [16], and old calibration data [20,21] providing supplementary fitting data. From the experiments performed in Sect.…”

Section: Numerical Campaign 41 Cfd Model Calibrationmentioning

confidence: 99%

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Development of an innovative validation strategy of gas–surface interaction modelling for re-entry applications

Joiner

Esser²,

Fertig³

et al. 2016

CEAS Space J

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enthalpy and hence) dissociation with facility stagnation pressure, it was not possible to obtain catalytic recombination coefficients from the measurements at high experimental stagnation pressures. Therefore, the CFD model calibration has been improved by this activity based on the low pressure results. The results of the model calibration were applied to the existing EXPERT mission profile to examine the impact of the experimentally calibrated model at flight relevant conditions. The heat flux overshoot at the CVD-SiC/PM1000 junction on EXPERT is confirmed to produce radiative equilibrium temperatures in close proximity to the PM1000 melt temperature.This was anticipated within the margins of the vehicle design; however, due to the measurements made here for the first time at relevant temperatures for the junction, an increased confidence in this finding is placed on the computations.

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“…The stagnation point conditions corresponding to a given spacecraft entry are reproduced for several minutes and the plasma flow carries sufficient energy to reproduce actual aerothermal loads experienced by a thermal protection system (TPS) in flight. Thanks to a flow of high chemical purity, plasmatron facilities are particularly suited to study gas/surface interaction phenomena for reusable TPS materials [2,3,4,5,6,7,8,9,10,11] or composite ablative material [12] . High-temperature experiments enable characterizing the catalytic properties of the tested TPS sample by combining direct measurements using various diagnostics and a numerical reconstruction based on computational fluid dynamics (CFD) simulations.…”

Section: Introductionmentioning

confidence: 99%

Robust reconstruction of the catalytic properties of thermal protection materials from sparse high-enthalpy facility experimental data

Sanson¹,

Panerai

Magin

et al. 2018

Experimental Thermal and Fluid Science

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Recent catalysis measurements at IRS

Cited by 35 publications

References 24 publications

Quantification of uncertainty on the catalytic property of reusable thermal protection materials from high enthalpy experiments

Quantification of uncertainty on the catalytic property of reusable thermal protection materials from high enthalpy experiments

Development of an innovative validation strategy of gas–surface interaction modelling for re-entry applications

Robust reconstruction of the catalytic properties of thermal protection materials from sparse high-enthalpy facility experimental data

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