Sawant, Saurabh S, Tumuklu, Ozgur, Theofilis, Vassilis 
ORCID: 0000-0002-7720-3434 and Levin, Deborah A
(2022)
Linear Instability of Shock-Dominated Laminar Hypersonic Separated Flows.
IUTAM LAMINAR-TURBULENT TRANSITION, 38.
pp. 651-660.
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2101.03688v1.pdf - Submitted version Download (2MB) | Preview |
Abstract
The self-excited spanwise homogeneous perturbations arising in shock-wave/boundary-layer interaction (SWBLI) system formed in a hypersonic flow of molecular nitrogen over a double wedge are investigated using the kinetic Direct Simulation Monte Carlo (DSMC) method. The flow has transitional Knudsen and unit Reynolds numbers of 3.4 x 10$^{-3}$ and 5.2 x 10$^4$ m$^{-1}$, respectively. Strong thermal nonequilibrium exists downstream of the Mach 7 detached (bow) shock generated due to the upper wedge surface. A linear instability mechanism is expected to make the pre-computed 2-D base flow potentially unstable under spanwise perturbations. The specific intent is to assess the growth rates of unstable modes, the wavelength, location, and origin of spanwise periodic flow structures, and the characteristic frequencies present in this interaction.
| Item Type: | Article |
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| Additional Information: | 10 pages, 6 figures. To appear in the proceedings of the IUTAM Transition 2019 |
| Uncontrolled Keywords: | physics.flu-dyn, physics.flu-dyn |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 01 Feb 2021 07:57 |
| Last Modified: | 18 Jan 2023 23:01 |
| DOI: | 10.1007/978-3-030-67902-6_57 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3115030 |
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