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Photogrammetric Surface Analysis of Ablation Processes in High-Enthalpy Air Plasma Flow

Löhle, Stefan and Stäbler, Tina and Reimer, Thomas and Cefalu, Alessandro (2015) Photogrammetric Surface Analysis of Ablation Processes in High-Enthalpy Air Plasma Flow. AIAA Journal, 53 (11), pp. 3187-3195. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J053728 ISSN 0001-1452

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/1.J053728

Abstract

Results from an in situ analysis of ablative heat shield materials based on stereoscopic photogrammetry during plasma wind tunnel testing are presented. A carbon fiber preform material sample has been investigated in a high-enthalpy airflow corresponding to a Hayabusa reentry condition at a 78 km altitude. The applied photogrammetry uses two digital single lens reflex cameras triggered at 3  frames/s to acquire images simultaneously from two different perspectives of the sample exposed to the high-speed flow. The photogrammetric analysis resolves the surface with 25,000  px/cm 2 , approximately 400 dpi, allowing the in situ analysis of the recession phenomena of ablators. Material inhomogeneities are identified during the ablation process, and surface recession is derived with an accuracy of 21  μm . The method is a useful tool for the investigation of temporally resolved volumetric ablation phenomena in low-density carbon phenolic materials.

Item URL in elib:https://elib.dlr.de/101325/
Document Type:Article
Title:Photogrammetric Surface Analysis of Ablation Processes in High-Enthalpy Air Plasma Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Löhle, StefanInstitut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Stäbler, TinaInstitut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Reimer, Thomasthomas.reimer (at) dlr.deUNSPECIFIED
Cefalu, AlessandroInstitut für Photogrammetrie, Universität StuttgartUNSPECIFIED
Date:November 2015
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
Volume:53
DOI :10.2514/1.J053728
Page Range:pp. 3187-3195
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0001-1452
Status:Published
Keywords:Ablation, recession, recession measurement, heat shield, re-entry, photogrammetry, TPS, ablator, carbon phenolic
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 - Proj. Thermas (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space System Integration
Deposited By: Reimer, Thomas
Deposited On:13 Jan 2016 17:08
Last Modified:31 Jul 2019 19:58

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