On the evolutions of triple point structure in wedge-stabilized oblique detonations
On the evolutions of triple point structure in wedge-stabilized oblique detonations
The oblique detonation induced by a two-dimensional semi-infinite wedge is simulated numerically with the Navier-Stokes equations and a detailed H2/air reaction model based on the open-source program-Adaptive Mesh Refinement in Object-oriented C++. A spatially seventh-order-accurate weighted essentially non-oscillatory scheme is adopted for the convective flux discretization. The formation and evolution of the oblique detonation induced by wedges at different angles and inflow conditions are investigated, and a prediction model for the oblique detonation flow field is proposed. The results show that the formation of the oblique detonation flow field can be divided into two processes. The first process is similar to the oblique shock flow field with unreactive inflow. When the inflow passes through the wedge, the oblique shock wave starts to form at the tip, followed by the unstable curved shock surface and triple point. In this process, a thin reaction layer is formed on the wedge front, but the thickness of the reaction layer is almost constant. The second process is similar to the process of deflagration to detonation. As the reaction rate increases, the deflagration front is fixed on the wedge, the reaction layer thickens, and the deflagration front gradually approaches the oblique shock wave. When the deflagration front is coupled with the oblique shock wave, the oblique detonation is formed. Moreover, a theoretical prediction model for the triple point location is proposed. Compared with the numerical simulation results, the theoretical model prediction for the position of the transition point of the oblique shock wave-oblique detonation wave is relatively acceptable.
Luan, Zhenye
8cf68510-8da1-4040-9ebc-820bcc311a4c
Huang, Yue
b61d46a7-90a8-4c1f-bd59-de326fc2eb87
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
You, Yancheng
09fe5931-deb7-4219-9655-697b3c64f303
17 June 2022
Luan, Zhenye
8cf68510-8da1-4040-9ebc-820bcc311a4c
Huang, Yue
b61d46a7-90a8-4c1f-bd59-de326fc2eb87
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
You, Yancheng
09fe5931-deb7-4219-9655-697b3c64f303
Luan, Zhenye, Huang, Yue, Deiterding, Ralf and You, Yancheng
(2022)
On the evolutions of triple point structure in wedge-stabilized oblique detonations.
Physics of Fluids, 34 (6), [067118].
(doi:10.1063/5.0090975).
Abstract
The oblique detonation induced by a two-dimensional semi-infinite wedge is simulated numerically with the Navier-Stokes equations and a detailed H2/air reaction model based on the open-source program-Adaptive Mesh Refinement in Object-oriented C++. A spatially seventh-order-accurate weighted essentially non-oscillatory scheme is adopted for the convective flux discretization. The formation and evolution of the oblique detonation induced by wedges at different angles and inflow conditions are investigated, and a prediction model for the oblique detonation flow field is proposed. The results show that the formation of the oblique detonation flow field can be divided into two processes. The first process is similar to the oblique shock flow field with unreactive inflow. When the inflow passes through the wedge, the oblique shock wave starts to form at the tip, followed by the unstable curved shock surface and triple point. In this process, a thin reaction layer is formed on the wedge front, but the thickness of the reaction layer is almost constant. The second process is similar to the process of deflagration to detonation. As the reaction rate increases, the deflagration front is fixed on the wedge, the reaction layer thickens, and the deflagration front gradually approaches the oblique shock wave. When the deflagration front is coupled with the oblique shock wave, the oblique detonation is formed. Moreover, a theoretical prediction model for the triple point location is proposed. Compared with the numerical simulation results, the theoretical model prediction for the position of the transition point of the oblique shock wave-oblique detonation wave is relatively acceptable.
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1180290_0_art_file_19452420_r8nn75
- Accepted Manuscript
More information
Accepted/In Press date: 2 June 2022
e-pub ahead of print date: 17 June 2022
Published date: 17 June 2022
Additional Information:
Funding Information:
This work is supported by the National Natural Science Foundation of China (Grant Nos. 51876182, 51406171, and 11972331) and Fundamental Research Funds for the Central Universities of China (Grant No. 20720180058).
Publisher Copyright:
© 2022 Author(s).
Identifiers
Local EPrints ID: 458072
URI: http://eprints.soton.ac.uk/id/eprint/458072
ISSN: 1070-6631
PURE UUID: 18726818-f547-4227-962c-6cad312739e5
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Date deposited: 28 Jun 2022 16:34
Last modified: 17 Mar 2024 03:39
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Author:
Zhenye Luan
Author:
Yue Huang
Author:
Yancheng You
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