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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 (2014) Photogrammetric Surface Analysis of Ablation Processes in High Enthalpy Air Plasma Flow. In: 11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. AIAA Aviation and Aeronautics Forum and Exposition 2014, 14.-20. Juni 2014, Atlanta, USA.

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Abstract

Results from 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 air flow corresponding to a Hayabusa re-entry condition in 78km altitude. The applied photogrammetry uses two digital single lens reflex (DSLR) cameras triggered at 3 fps to acquire images simultaneously from two different perspectives of the sample exposed to the high Speed flow. The photogrammetric analysis resolves the surface with 25000 px/cm2, 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 micro�meters. 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/92476/
Document Type:Conference or Workshop Item (Speech)
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:June 2014
Journal or Publication Title:11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Photogrammetrie, in-situ-Messung, Ablation, Plasmawindkanal
Event Title:AIAA Aviation and Aeronautics Forum and Exposition 2014
Event Location:Atlanta, USA
Event Type:international Conference
Event Dates:14.-20. Juni 2014
Organizer:AIAA
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 - Raumfahrzeugsysteme - Rückkehrtechnologie
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space System Integration
Deposited By: Reimer, Thomas
Deposited On:23 Dec 2014 17:12
Last Modified:31 Jul 2019 19:49

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