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Experiments in Fluids

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01-04-2021 | Research Article

Pulsed jet phase-averaged flow field estimation based on neural network approach

Authors: Céletin Ott, Charles Pivot, Pierre Dubois, Quentin Gallas, Jérôme Delva, Marc Lippert, Laurent Keirsbulck

Published in: Experiments in Fluids | Issue 4/2021

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Abstract

Single hot-wire velocity measurements have been conducted along a three-dimensional measurement grid to capture the flow-field induced by a 45\(^\circ\) inclined slotted pulsed jet. Based on the periodic behavior of the flow, two different estimation methods have been implemented. The first one, considered as the reference baseline, is the conditional approach which consists in the redistribution of the experimental data into space- and time-resolved three-dimensional velocity fields. The second one uses a neural network to estimate 3D velocity fields given spatial coordinates and time. This paper compares the two methods for a complete flow-field estimation based on hot-wire measurements. Results suggest that the neural network is tailored to capture the phase-averaged dynamic response of the jet induced by the actuator, and identify the coherent structures in the flow field. Interesting performances are also observed when degrading the learning database, meaning that neural networks can be used to drastically improve the temporal or spatial resolution of a flow field estimation compared to the experimental data resolution.

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Title: Pulsed jet phase-averaged flow field estimation based on neural network approach
Authors: Céletin Ott
Charles Pivot
Pierre Dubois
Quentin Gallas
Jérôme Delva
Marc Lippert
Laurent Keirsbulck
Publication date: 01-04-2021
Publisher: Springer Berlin Heidelberg
Published in: Experiments in Fluids / Issue 4/2021
Print ISSN: 0723-4864
Electronic ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-021-03180-0

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