Autonomous planar conductivity array sensor for fast liquid distribution imaging in a fluid coupling |
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Authors: | MJ Y T E S R K-H U |
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Affiliation: | aInstitute of Safety Research, Forschungszentrum Dresden-Rossendorf e.V., P.O. Box 510119, 01314 Dresden, Germany;bVoith Turbo GmbH, Voithstrasse 1, 74564 Crailsheim, Germany |
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Abstract: | In this article, we introduce a new autonomous planar array sensor based on the measurements of electrical conductivity which has been applied to the visualization of fluid distributions inside a fluid coupling during normal operation. The sensor is composed of approximately 1000 interdigital sensing structures which are used to measure the two-dimensional electrical conductivity distribution at the sensor's surface with a fast multiplexed probing–sensing scheme at up to 10 kHz frame rate. Two such sensors were used to measure dynamic two-phase flow patterns in a fluid coupling at full operation at 790 rpm speed. Therefore, the sensors were mounted on the pressure-side and the suction-side walls of a blade channel inside a test coupling. The whole measurement system is run on a battery and controlled via wireless link, thus being fully autonomous, which enables sensor and electronics to rotate together with the coupling. |
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Keywords: | Planar sensor Interdigital electrodes Conductivity measurement Flow measurement Fluid coupling Turbo machinery |
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