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Multi-needle capacitance probe for non-conductive two-phase flows

Monr�s-Andreu, G.; Martinez-Cuenca, R.; Torr�, S.; Escrig, J.; Hewakandamby, B.; Chiva, S.

Authors

G. Monr�s-Andreu

R. Martinez-Cuenca

S. Torr�

J. Escrig

S. Chiva



Abstract

Despite its variable degree of application, intrusive instrumentation is the most accurate way to obtain local information in a two-phase flow system, especially local interfacial velocity and local interfacial area parameters. In this way, multi-needle probes, based on conductivity or optical principles, have been extensively used in the past few decades by many researchers in two-phase flow investigations. Moreover, the signal processing methods used to obtain the time-averaged two-phase flow parameters in this type of sensor have been thoroughly discussed and validated by many experiments.
The objective of the present study is to develop a miniaturized multi-needle probe, based on capacitance measurements applicable to a wide range of non-conductive two-phase flows and, thus, to extend the applicability of multi-needle sensor whilst also maintaining a signal processing methodology provided in the literature for conductivity probes.
Results from the experiments performed assess the applicability of the proposed sensor measurement principle and signal processing method for the bubbly flow regime. These results also provide an insight into the sensor application for more complex two-phase flow regimes.

Citation

Monrós-Andreu, G., Martinez-Cuenca, R., Torró, S., Escrig, J., Hewakandamby, B., & Chiva, S. (2016). Multi-needle capacitance probe for non-conductive two-phase flows. Measurement Science and Technology, 27(7), Article 074004. https://doi.org/10.1088/0957-0233/27/7/074004

Journal Article Type Article
Acceptance Date Mar 2, 2016
Publication Date May 31, 2016
Deposit Date Jul 13, 2017
Publicly Available Date Mar 28, 2024
Journal Measurement Science and Technology
Print ISSN 0957-0233
Electronic ISSN 1361-6501
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 27
Issue 7
Article Number 074004
DOI https://doi.org/10.1088/0957-0233/27/7/074004
Keywords two-phase flow, needle probes, local flow parameters, non-conductive mixture, capacitance probes
Public URL https://nottingham-repository.worktribe.com/output/787721
Publisher URL https://doi.org/10.1088/0957-0233/27/7/074004