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Detection of Bubbles in Cryogenic Liquids using Electrical Capacitance Tomography

Titelangaben

Kandlbinder-Paret, Christoph ; Fischerauer, Alice ; Fischerauer, Gerhard:
Detection of Bubbles in Cryogenic Liquids using Electrical Capacitance Tomography.
In: Soleimani, Manuch , International Society for Industrial Process Tomography (ISIPT) (Hrsg.): Proceedings of the 9th World Congress on Industrial Process Tomography (WC-IPT-9). - Bath, UK : International Society for Industrial Process Tomography , 2018 . - S. 383-388 . - (ISIPT World Congress on Industrial Process Tomography (ISSN 2309-3870) ; 9 )

Abstract

The control of cryogenic liquid propellants used in heavy-lift launchers requires a thorough understanding of fluid phenomena and in particular of bubble formation and local boiling effects under microgravity conditions. This contribution reports on an electrical capacitance tomography (ECT) system that can observe the behaviour of those liquids. A cylindrical polycarbonate cylinder was
submerged into liquid nitrogen (LN2) to monitor the location and size of bubbles. The capacitances were measured by a commercial capacitance sensor. Finite-element (FE) simulations in Ansys were used to calculate the sensitivity matrix. The projected Landweber algorithm served to reconstruct images of the permittivity distribution. For validation purposes, visual images of bubbles and bubble
streams were recorded with a camera. The experimental results of the ECT system agreed well with these visual observations. The system recognized bubbles with diameters down to about 15 mm or bubble streams containing multiple smaller bubbles with identical dimensions.

Weitere Angaben

Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Nein
Keywords: Bubbles; Cryogenic; ECT
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Forschungseinrichtungen > Forschungsstellen > ZET - Zentrum für Energietechnik
Forschungseinrichtungen
Forschungseinrichtungen > Forschungsstellen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 28 Sep 2018 06:29
Letzte Änderung: 28 Sep 2018 06:29
URI: https://eref.uni-bayreuth.de/id/eprint/45910