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Studying the effect of wall cooling in supersonic boundary layer flow using resolvent analysis

Bae, Hyunji Jane and Dawson, Scott T. and McKeon, Beverley J. (2020) Studying the effect of wall cooling in supersonic boundary layer flow using resolvent analysis. In: AIAA Scitech 2020 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2020-0575. ISBN 978-1-62410-595-1. https://resolver.caltech.edu/CaltechAUTHORS:20200113-074130443

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Abstract

Analysis of the resolvent operator is used to study the properties of high-speed turbulent boundary layers for cooled walls. Previous study [1] shows that the resolvent response modes in the relatively subsonic region of high-speed turbulent boundary layers with adiabatic wall boundary conditions follow the same scaling law as those of the incompressible boundary layer case, validating Morkovin’s hypothesis on a mode-by-mode basis. Here, we study the effect of the cooled-wall boundary condition on the individual resolvent response modes to understand the underlying mechanisms that cause the failure of Morkovin’s hypothesis and velocity transformations for increasingly non-adiabatic walls. In particular, we show that the density and temperature resolvent mode shapes for the cooled-wall case exhibit a secondary peak in the inner and logarithmic layer, which is a result of the non-monotonic mean temperature profile that is absent in adiabatic cases. We also show that the secondary peak becomes more prominent with decreasing surface temperature ratio. The deviation of the mean velocity profiles is attributed to the change in the response modes in the near-wall region, the effect of which is propagated further away from the wall through nonlinear interactions.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2020-0575DOIArticle
ORCID:
AuthorORCID
Dawson, Scott T.0000-0002-0020-2097
McKeon, Beverley J.0000-0003-4220-1583
Additional Information:© 2020 American Institute of Aeronautics and Astronautics. Published Online: 5 Jan 2020.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2020-0575
Record Number:CaltechAUTHORS:20200113-074130443
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200113-074130443
Official Citation:Studying the effect of wall cooling in supersonic boundary layer flow using resolvent analysis. Hyunji Jane Bae, Scott T. Dawson, and Beverley J. McKeon. AIAA Scitech 2020 Forum. January 2020; doi: 10.2514/6.2020-0575
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100652
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Jan 2020 18:25
Last Modified:13 Jan 2020 18:25

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