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Measurements by Means of Optical Tracking in the High Enthalpy Shock Tunnel Göttingen, HEG

Friedl, Damian and Martinez Schramm, Jan and Hannemann, Klaus (2015) Measurements by Means of Optical Tracking in the High Enthalpy Shock Tunnel Göttingen, HEG. 8th European Symposium on Aerothermodynamics for Space Vehicles, 2015-03-02 - 2015-03-06, Lissabon, Portugal.

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Official URL: http://www.congrexprojects.com/Custom/15A01/Index.html


Measurements of aerodynamic forces and moments in ground-based hypersonic shock tunnels are complicated by the brevity of the available test time of these facilities. A practical way to perform these measurements in a nonintrusive way, avoiding possible interference with support structures, is the free-flight technique paired with optical tracking: After detachment from an initial support, the test model moves freely with the flow. A sequence of images is acquired at high speed capturing the model movement. An algorithm is used to match the model contour in the images with the known model contour. From the resulting model displacement over time, aerodynamic forces and moments are calculated by assuming constant acceleration during a time window of steady flow conditions. The development and implementation of this technique at the High Enthalpy Shock Tunnel Göttingen, HEG of the German Aerospace Center is described and exemplified using an experiment with a free-flying capsule model.

Item URL in elib:https://elib.dlr.de/95931/
Document Type:Conference or Workshop Item (Speech)
Additional Information:http://www.congrexprojects.com/Custom/15A01/Papers/Room%201.1/Thursday/Measurement%20techniques%20V/89811_MartinezSchramm.pdf
Title:Measurements by Means of Optical Tracking in the High Enthalpy Shock Tunnel Göttingen, HEG
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Martinez Schramm, JanUNSPECIFIEDhttps://orcid.org/0000-0002-8891-6253UNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-7
Series Name:Conference Proceedings online
Keywords:Force Measurement, Free Flight Technique, Optical Tracking, High Enthalpy, Aerothermodynamics
Event Title:8th European Symposium on Aerothermodynamics for Space Vehicles
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Start Date:2 March 2015
Event End Date:6 March 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Anlagen u. Messtechnik (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:05 May 2015 11:39
Last Modified:24 Apr 2024 20:01

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