Global Linear Stability and Sensitivity of Hypersonic Shock-Boundary Layer Interactions

G. S. Sidharth; A. Dwivedi; J. W. Nichols; M. Jovanović; G. V. Candler

doi:10.1007/978-3-030-67902-6_42

Global Linear Stability and Sensitivity of Hypersonic Shock-Boundary Layer Interactions

G. S. Sidharth, A. Dwivedi, J. W. Nichols, M. Jovanović, G. V. Candler

Aerospace Engineering and Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Chapter

3 Scopus citations

Abstract

Understanding physical mechanisms that cause transition of laminar boundary layers to turbulent state in hypersonic flows is important for vehicle design and analysis. Mechanisms of linear perturbation growth in high speed boundary layers subjected to abrupt inviscid pressure jumps have been relatively less studied. Inviscid pressure jumps are associated with geometry effects and impinging shocks. They cause the boundary layer to separate, forming a separation-reattachment shock system. In the present study, we investigate small perturbation growth in a nominally two-dimensional interaction on a slender double wedge. We report and discuss intrinsic instabilities as well as amplification of external perturbations in the setup, both of which result in streamwise heat flux streaks near and post-reattachment.

Original language	English (US)
Title of host publication	IUTAM Bookseries
Publisher	Springer Science and Business Media B.V.
Pages	489-498
Number of pages	10
DOIs	https://doi.org/10.1007/978-3-030-67902-6_42
State	Published - Jul 31 2021

Publication series

Name	IUTAM Bookseries
Volume	38
ISSN (Print)	1875-3507
ISSN (Electronic)	1875-3493

Bibliographical note

Funding Information:
Acknowledgements This work was presented by Dr. N. Hildebrand with support from NASA. Financial support from the AFOSR (award FA9550-18-1-0422) and ONR (awards N00014-17-1-2496 and N00014-19-1-2037) is gratefully acknowledged by AD, JWN, MRJ and GVC.

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

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abstract = "Understanding physical mechanisms that cause transition of laminar boundary layers to turbulent state in hypersonic flows is important for vehicle design and analysis. Mechanisms of linear perturbation growth in high speed boundary layers subjected to abrupt inviscid pressure jumps have been relatively less studied. Inviscid pressure jumps are associated with geometry effects and impinging shocks. They cause the boundary layer to separate, forming a separation-reattachment shock system. In the present study, we investigate small perturbation growth in a nominally two-dimensional interaction on a slender double wedge. We report and discuss intrinsic instabilities as well as amplification of external perturbations in the setup, both of which result in streamwise heat flux streaks near and post-reattachment.",

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AU - Sidharth, G. S.

AU - Dwivedi, A.

AU - Nichols, J. W.

AU - Jovanović, M.

AU - Candler, G. V.

N1 - Funding Information: Acknowledgements This work was presented by Dr. N. Hildebrand with support from NASA. Financial support from the AFOSR (award FA9550-18-1-0422) and ONR (awards N00014-17-1-2496 and N00014-19-1-2037) is gratefully acknowledged by AD, JWN, MRJ and GVC. Publisher Copyright: © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

PY - 2021/7/31

Y1 - 2021/7/31

N2 - Understanding physical mechanisms that cause transition of laminar boundary layers to turbulent state in hypersonic flows is important for vehicle design and analysis. Mechanisms of linear perturbation growth in high speed boundary layers subjected to abrupt inviscid pressure jumps have been relatively less studied. Inviscid pressure jumps are associated with geometry effects and impinging shocks. They cause the boundary layer to separate, forming a separation-reattachment shock system. In the present study, we investigate small perturbation growth in a nominally two-dimensional interaction on a slender double wedge. We report and discuss intrinsic instabilities as well as amplification of external perturbations in the setup, both of which result in streamwise heat flux streaks near and post-reattachment.

AB - Understanding physical mechanisms that cause transition of laminar boundary layers to turbulent state in hypersonic flows is important for vehicle design and analysis. Mechanisms of linear perturbation growth in high speed boundary layers subjected to abrupt inviscid pressure jumps have been relatively less studied. Inviscid pressure jumps are associated with geometry effects and impinging shocks. They cause the boundary layer to separate, forming a separation-reattachment shock system. In the present study, we investigate small perturbation growth in a nominally two-dimensional interaction on a slender double wedge. We report and discuss intrinsic instabilities as well as amplification of external perturbations in the setup, both of which result in streamwise heat flux streaks near and post-reattachment.

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BT - IUTAM Bookseries

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ER -

Global Linear Stability and Sensitivity of Hypersonic Shock-Boundary Layer Interactions

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