Effects of hot jet on detonation initiation and propagation in supersonic combustible mixtures
Effects of hot jet on detonation initiation and propagation in supersonic combustible mixtures
The effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures has been studied with two-dimensional numerical simulations with the open-source program AMROC that uses a block-structured adaptive mesh refinement method. Results indicate that the hot jet could ignite the detonation effectively in supersonic combustible mixtures like a pneumatic ramp. After the realization of the detonation initiation, the hot jet can still play an important role on the detonation propagation during its continuous ejection. For a hot jet with certain diameter, it can result in an overdriven detonation with almost constant overdrive degree. After the shutdown of the hot jet, the stable CJ detonation combustion was realized finally in the supersonic combustible mixtures. With the re-ejection of the hot jet, the failed detonation could be reinitiated quickly. Through the control of the re-ejection of the hot jet, it plays a key role not only in the initiation process, but also in the subsequent continuous detonation combustion period.
adaptive mesh refinement, supersonic combustible mixtures, initiation and propagation, hot jet effects
265-277
Cai, X.
c733b422-c2e4-44f9-a7f1-6ac222f489bc
Liang, J.
96602708-8db0-465d-89ce-ed1e0f9fa499
Lin, Z.
b737d8cb-3642-46d4-8915-7e273b3ecda3
Deiterding, R.
ce02244b-6651-47e3-8325-2c0a0c9c6314
December 2014
Cai, X.
c733b422-c2e4-44f9-a7f1-6ac222f489bc
Liang, J.
96602708-8db0-465d-89ce-ed1e0f9fa499
Lin, Z.
b737d8cb-3642-46d4-8915-7e273b3ecda3
Deiterding, R.
ce02244b-6651-47e3-8325-2c0a0c9c6314
Cai, X., Liang, J., Lin, Z. and Deiterding, R.
(2014)
Effects of hot jet on detonation initiation and propagation in supersonic combustible mixtures.
Acta Astronautica, 105 (1), .
(doi:10.1016/j.actaastro.2014.08.019).
Abstract
The effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures has been studied with two-dimensional numerical simulations with the open-source program AMROC that uses a block-structured adaptive mesh refinement method. Results indicate that the hot jet could ignite the detonation effectively in supersonic combustible mixtures like a pneumatic ramp. After the realization of the detonation initiation, the hot jet can still play an important role on the detonation propagation during its continuous ejection. For a hot jet with certain diameter, it can result in an overdriven detonation with almost constant overdrive degree. After the shutdown of the hot jet, the stable CJ detonation combustion was realized finally in the supersonic combustible mixtures. With the re-ejection of the hot jet, the failed detonation could be reinitiated quickly. Through the control of the re-ejection of the hot jet, it plays a key role not only in the initiation process, but also in the subsequent continuous detonation combustion period.
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More information
Accepted/In Press date: 20 August 2014
e-pub ahead of print date: 3 September 2014
Published date: December 2014
Keywords:
adaptive mesh refinement, supersonic combustible mixtures, initiation and propagation, hot jet effects
Organisations:
Aerodynamics & Flight Mechanics Group
Identifiers
Local EPrints ID: 380650
URI: http://eprints.soton.ac.uk/id/eprint/380650
ISSN: 0094-5765
PURE UUID: 619ae3ef-2e56-4bbf-8494-4af892bac42e
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Date deposited: 08 Sep 2015 15:41
Last modified: 15 Mar 2024 03:52
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Contributors
Author:
X. Cai
Author:
J. Liang
Author:
Z. Lin
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