Abstract
We report interferometric ice particle imaging and sizing in an icing wind tunnel with wind speeds of 70 m/s. Single particle interferograms are first analysed, size measurements are performed, and examples of possible reconstructed shapes are deduced from the interferometric images. Particle sizing is also performed in the case of ice particles whose out-of-focus images overlap, with or without Moiré phenomena. Results show that the IPI technique can be carried out for irregular rough particles in a critical environment such as in an icing wind tunnel with high wind speeds.
Highlights
We present and discuss the results obtained. They confirm that measurement of the size of ice particles is still possible using the interferometric particle imaging device (IPI) technique when the speed of the air flow reaches 70 m/s, as long as the concentration of particles is not too high, as commonly observed with Interferometric laser imaging for droplet sizing (ILIDS)
We will deal with more complex cases where out-of-focus images of two or three nearby ice particles overlap without Moiré effects
We carried out ice crystals size measurements in an icing tunnel where the
Summary
Citation: Talbi, M.; Duperrier, R.; Delestre, B.; Godard, G.; Brunel, M.Interferometric Ice Particle Imaging in a Wind Tunnel. Optics 2021, 2, 216–227. https://doi.org/10.3390/ opt2040020Academic Editors: Costantino DeAngelis and Thomas SeegerReceived: 20 July 2021Accepted: 26 September 2021Published: 5 October 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.Attribution (CC BY) license (https://
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