Gnani, F., Zare-Behtash, H. , White, C. and Kontis, K. (2018) Effect of back-pressure forcing on shock train structures in rectangular channels. Acta Astronautica, 145, pp. 471-481. (doi: 10.1016/j.actaastro.2018.02.010)
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Abstract
The deceleration of a supersonic flow to the subsonic regime inside a high-speed engine occurs through a series of shock waves, known as a shock train. The generation of such a flow structure is due to the interaction between the shock waves and the boundary layer inside a long and narrow duct. The understanding of the physics governing the shock train is vital for the improvement of the design of high-speed engines and the development of flow control strategies. The present paper analyses the sensitivity of the shock train configuration to a back-pressure variation. The complex characteristics of the shock train at an inflow Mach number M = 2 in a channel of constant height are investigated with two-dimensional RANS equations closed by the Wilcox k-ω turbulence model. Under a sinusoidal back-pressure variation, the simulated results indicate that the shock train executes a motion around its mean position that deviates from a perfect sinusoidal profile with variation in oscillation amplitude, frequency, and whether the pressure is first increased or decreased.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Gnani, Francesca and Zare-Behtash, Dr Hossein and White, Dr Craig and Kontis, Professor Konstantinos |
Authors: | Gnani, F., Zare-Behtash, H., White, C., and Kontis, K. |
Subjects: | Q Science > Q Science (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics |
College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
Journal Name: | Acta Astronautica |
Publisher: | Elsevier |
ISSN: | 0094-5765 |
ISSN (Online): | 0094-5765 |
Published Online: | 15 February 2018 |
Copyright Holders: | Copyright © 2018 Crown Copyright |
First Published: | First published in Acta Astronautica 145: 471-481 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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