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Transitional shockwave/boundary layer interaction experiments in the R2Ch blowdown wind tunnel.

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Title: Transitional shockwave/boundary layer interaction experiments in the R2Ch blowdown wind tunnel.
Authors: Lugrin, Mathieu1 (AUTHOR) mathieu.lugrin@onera.fr, Nicolas, François1 (AUTHOR), Severac, Nicolas1 (AUTHOR), Tobeli, Jean-Pierre1 (AUTHOR), Beneddine, Samir1 (AUTHOR), Garnier, Eric1 (AUTHOR), Esquieu, Sebastien2 (AUTHOR), Bur, Reynald1 (AUTHOR)
Source: Experiments in Fluids. Feb2022, Vol. 63 Issue 2, p1-19. 19p.
Subjects: Wind tunnels, Proper orthogonal decomposition, Shock waves, Mach number, Reynolds number
Abstract: Transitional shockwave/boundary layer interactions (SBLI) are studied experimentally. Experiments are conducted on a hollow-cylinder flare model in the R2Ch blowdown facility at a Mach number of 5 for three different Reynolds numbers in the transitional regime. Unsteady wall pressure measurements are conducted along with mean and unsteady heat flux measurements and high-speed Schlieren imaging. The images are then processed using Proper Orthogonal Decomposition (POD) and Spectral Proper Orthogonal Decomposition (SPOD) to extract relevant information. Two main phenomena are identified and documented: the oblique modes traveling in the shear layer above the recirculation region and the streaks appearing in the reattachment region. New results illustrating the multiple physical origins of the streaks, either linked with globally unstable modes and convectively unstable mechanisms, are discussed. [ABSTRACT FROM AUTHOR]
Copyright of Experiments in Fluids is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 155807239
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PubType: Academic Journal
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  Data: Transitional shockwave/boundary layer interaction experiments in the R2Ch blowdown wind tunnel.
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  Data: <searchLink fieldCode="AR" term="%22Lugrin%2C+Mathieu%22">Lugrin, Mathieu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mathieu.lugrin@onera.fr</i><br /><searchLink fieldCode="AR" term="%22Nicolas%2C+François%22">Nicolas, François</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Severac%2C+Nicolas%22">Severac, Nicolas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tobeli%2C+Jean-Pierre%22">Tobeli, Jean-Pierre</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Beneddine%2C+Samir%22">Beneddine, Samir</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Garnier%2C+Eric%22">Garnier, Eric</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Esquieu%2C+Sebastien%22">Esquieu, Sebastien</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bur%2C+Reynald%22">Bur, Reynald</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Experiments+in+Fluids%22">Experiments in Fluids</searchLink>. Feb2022, Vol. 63 Issue 2, p1-19. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Wind+tunnels%22">Wind tunnels</searchLink><br /><searchLink fieldCode="DE" term="%22Proper+orthogonal+decomposition%22">Proper orthogonal decomposition</searchLink><br /><searchLink fieldCode="DE" term="%22Shock+waves%22">Shock waves</searchLink><br /><searchLink fieldCode="DE" term="%22Mach+number%22">Mach number</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+number%22">Reynolds number</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Transitional shockwave/boundary layer interactions (SBLI) are studied experimentally. Experiments are conducted on a hollow-cylinder flare model in the R2Ch blowdown facility at a Mach number of 5 for three different Reynolds numbers in the transitional regime. Unsteady wall pressure measurements are conducted along with mean and unsteady heat flux measurements and high-speed Schlieren imaging. The images are then processed using Proper Orthogonal Decomposition (POD) and Spectral Proper Orthogonal Decomposition (SPOD) to extract relevant information. Two main phenomena are identified and documented: the oblique modes traveling in the shear layer above the recirculation region and the streaks appearing in the reattachment region. New results illustrating the multiple physical origins of the streaks, either linked with globally unstable modes and convectively unstable mechanisms, are discussed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Experiments in Fluids is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00348-022-03395-9
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      – SubjectFull: Proper orthogonal decomposition
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      – SubjectFull: Shock waves
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              Text: Feb2022
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