elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Development and Design of 2D and 3D Setups for the Improvement of Tomographic Background Oriented Schlieren Reconstruction Method

Ragni, Daniele (2007) Development and Design of 2D and 3D Setups for the Improvement of Tomographic Background Oriented Schlieren Reconstruction Method. Diplomarbeit. DLR-Interner Bericht. DLR-IB 224-2008 A 17, 100 S.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

The Background Oriented Schlieren Method is a measurement system suitable for every kind of flow with variations in the refractive index of the medium. The last ones can be caused by compressible effects, temperature gradients, density changes or mixing of different phases. Since quantitative information can be obtained, the method is able to detect large fluid structures as well as small turbulent ones; anyway there is the necessity to study the inaccuracies in the procedure. Moreover, there has to be the possibility, for a given experimental setup, to give at least a first estimate of the error “before doing the measurement”. That is, if someone wants to use the Background Oriented Schlieren Method as a “validating” measurement system (“au pair” of other more complex measurement chains), he should be able not only to give some information about the error bar connected with the extracted values, but to predict (given a known setup) which will be the amount of the final error. That is way it has been created a simple 2D theoretical model and extended it to more complex 3D cases, trying to give a reasonable estimate of the inaccuracies in the measurements. The attempt to prove the theoretical simple model is successful in the 2D images error evaluation, while should be taken with care if used with 3D Backprojection algorithms, since they create strong artifacts. That is why it can be suggested to pass from Anti-Radon Transform to ART algorithms, or to improve the first with different formulations.

Dokumentart:Berichtsreihe (DLR-Interner Bericht, Diplomarbeit)
Titel:Development and Design of 2D and 3D Setups for the Improvement of Tomographic Background Oriented Schlieren Reconstruction Method
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Ragni, DanieleNICHT SPEZIFIZIERT
Datum:Dezember 2007
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenanzahl:100
Name der Reihe:Diplomarbeit
Status:veröffentlicht
Stichwörter:Background Oriented Schlieren Method, 3D Backprojection algorithms
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Ilka Micknaus
Hinterlegt am:19 Aug 2008
Letzte Änderung:27 Apr 2009 14:57

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.