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Characterization of High-Enthalpy-Flow Environment for Ablation Material Tests Using Advanced Diagnostics

Gülhan, Ali and Esser, Burkard and Koch, Uwe and Fischer, Michael and Magens, Eggert and Hannemann, Volker (2017) Characterization of High-Enthalpy-Flow Environment for Ablation Material Tests Using Advanced Diagnostics. AIAA Journal. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J056312 ISSN 0001-1452

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Abstract

For reliable material qualification in high-enthalpy flows, detailed characterization of material and flow parameters is essential. Therefore, the flowfield of arc-heated facility L3K, which has been intensively used for ablation material tests in Europe, has been characterized using advanced diagnostic tools. For the first time, the complete flow chain from the reservoir to the freestream and shock layer has been studied using sophisticated measurement techniques. Rotational and vibrational temperatures of nitrogen molecules were measured in the reservoir, freestream, and shock layer using coherent anti-Stokes Raman scattering. In addition, the temperatures of NO molecules in the freestream were measured by means of laser-induced fluorescence. Emission spectroscopy provided quantitative data of shock-layer temperatures. For the measurement of the freestream velocity and electron density, a microwave interferometer has been used. In addition, the pitot pressure and cold wall heat flux rate have been measured by means of intrusive probes. Parallel to the experimental investigation, numerical rebuilding of the flowfield has been conducted by using the DLR, German Aerospace Center’s TAU code. The results of the multitemperature model provide further insight into the flow physics of the facility.

Item URL in elib:https://elib.dlr.de/116475/
Document Type:Article
Title:Characterization of High-Enthalpy-Flow Environment for Ablation Material Tests Using Advanced Diagnostics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gülhan, Aliali.guelhan (at) dlr.deUNSPECIFIED
Esser, Burkardburkard.esser (at) dlr.deUNSPECIFIED
Koch, Uweuwe.koch (at) dlr.deUNSPECIFIED
Fischer, Michaelmichael.fischer (at) dlr.deUNSPECIFIED
Magens, Eggerteggert.magens (at) dlr.deUNSPECIFIED
Hannemann, Volkervolker.hannemann (at) dlr.deUNSPECIFIED
Date:December 2017
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.J056312
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0001-1452
Status:Published
Keywords:High Enthalpy Flow, Arc Heated Facility L3K, Flow Diagnostic, CARS, LIF, MW Interferometer, CFD, TAU Code
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 - Wiederverwendbare Raumfahrtsysteme und Antriebstechnologie
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Gülhan, Dr.-Ing. Ali
Deposited On:14 Dec 2017 09:57
Last Modified:23 Feb 2019 00:22

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