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Detection of Bubbles in Cryogenic Liquids using Electrical Capacitance Tomography

Title data

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) (ed.): Proceedings of the 9th World Congress on Industrial Process Tomography (WC-IPT-9). - Bath, UK : International Society for Industrial Process Tomography , 2018 . - pp. 383-388 . - (ISIPT World Congress on Industrial Process Tomography (ISSN 2309-3870) ; 9 )

Abstract in another language

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.

Further data

Item Type: Article in a book
Refereed: No
Keywords: Bubbles; Cryogenic; ECT
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 28 Sep 2018 06:29
Last Modified: 28 Sep 2018 06:29
URI: https://eref.uni-bayreuth.de/id/eprint/45910