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

Joiner, N. and Esser, Burkard and Fertig, Markus and Gülhan, Ali and Herdrich, Georg and Massuti-Ballester, B. (2016) Development of an innovative validation strategy of gas–surface interaction modelling for re‑entry applications. CEAS Space Journal. Springer. ISSN 1868-2502

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Abstract This paper summarises the final synthesis of an ESA technology research programme entitled “Development of an Innovative Validation Strategy of Gas Surface Interaction Modelling for Re-entry Applications”. The focus of the project was to demonstrate the correct pressure dependency of catalytic surface recombination, with an emphasis on Low Earth Orbit (LEO) re-entry conditions and thermal protection system materials. A physics-based model describing the prevalent recombination mechanisms was proposed for implementation into two CFD codes, TINA and TAU. A dedicated experimental campaign was performed to calibrate and validate the CFD model on TPS materials pertinent to the EXPERT space vehicle at a wide range of temperatures and pressures relevant to LEO. A new set of catalytic recombination data was produced that was able to improve the chosen model calibration for CVD-SiC and provide the first model calibration for the Nickel–Chromium super-alloy PM1000. The experimentally observed pressure dependency of catalytic recombination can only be reproduced by the Langmuir–Hinshelwood recombination mechanism. Due to decreasing degrees of (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 CVDSiC/ 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.

Item URL in elib:https://elib.dlr.de/104579/
Document Type:Article
Title:Development of an innovative validation strategy of gas–surface interaction modelling for re‑entry applications
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Esser, BurkardBurkard.Esser (at) dlr.deUNSPECIFIED
Fertig, MarkusMarkus.Fertig (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Herdrich, Georgherdrich (at) irs.uni-stuttgart.deUNSPECIFIED
Massuti-Ballester, B.massuti (at) irs.uni-stuttgart.deUNSPECIFIED
Date:18 May 2016
Journal or Publication Title:CEAS Space Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Gülhan, Aliali.guelhan@dlr.de
Keywords:Aerothermodynamics · Catalytic recombination · CFD · High-enthalpy facilities
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeuge Entwurf, Systemanalyse, Simulation, Messtechnik
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Jäger, Monika
Deposited On:11 Jul 2016 11:14
Last Modified:14 Dec 2019 04:27

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