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Experiments in Fluids
Erschienen in: Experiments in Fluids 5/2016

01.05.2016 | Research Article

IR thermography for dynamic detection of laminar-turbulent transition

verfasst von: Bernhard Simon, Adrian Filius, Cameron Tropea, Sven Grundmann

Erschienen in: Experiments in Fluids | Ausgabe 5/2016

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Abstract

This work investigates the potential of infrared (IR) thermography for the dynamic detection of laminar-turbulent transition. The experiments are conducted on a flat plate at velocities of 8–14 m/s, and the transition of the laminar boundary layer to turbulence is forced by a disturbance source which is turned on and off with frequencies up to 10 Hz. Three different heating techniques are used to apply the required difference between fluid and structure temperature: a heated aluminum structure is used as an internal structure heating technique, a conductive paint acts as a surface bounded heater, while an IR heater serves as an example for an external heating technique. For comparison of all heating techniques, a normalization is introduced and the frequency response of the measured IR camera signal is analyzed. Finally, the different heating techniques are compared and consequences for the design of experiments on laminar-turbulent transition are discussed.
Vorheriger Artikel Reattachment heating upstream of short compression ramps in hypersonic flow
Nächster Artikel Dynamic mode decomposition for non-uniformly sampled data

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Metadaten
Titel
IR thermography for dynamic detection of laminar-turbulent transition
verfasst von
Bernhard Simon
Adrian Filius
Cameron Tropea
Sven Grundmann
Publikationsdatum
01.05.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Experiments in Fluids / Ausgabe 5/2016
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-016-2178-9

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