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Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet

Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet
Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet
An open-source program implementing a block-structured adaptive mesh refinement method was adopted for the fine structure numerical simulation of detonation initiation in supersonic combustible mixtures. Simulations were conducted on a nested parallel computing system. The initiation process was specified as three stages, and their respective flow field characteristics were analyzed. Results indicate that a hot jet under specific conditions can have a similar effect as a pneumatic oblique bevel for inducing periodical shock-induced detonative combustion by a bow shock. The interaction of bow shock–induced combustion with the local detonation wave, produced by the reflection shock on the upper wall, can create a structure with two triple-wave points. The hot jet not only plays a role in the detonation initiation but also acts as a stabilizing control mechanism for detonation propagation. In the simulations in this study, the detonation wave propagates in an overdriven state initially and achieves self-sustaining motion after the shutdown of the hot jet. Subsequently, the final pisiform structure of typical stable Chapman-Jouguet detonation cells is formed.
adaptive mesh refinement, supersonic combustible mixtures, hot jet, detonation initiation, pisiform detonation cell
0893-1321
1-11
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
Qin, H.
6e1cead2-6726-4d85-bcee-5086a205be4f
Han, X.
0b4e4187-1116-4090-94f6-74ddaf02fb6d
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
Qin, H.
6e1cead2-6726-4d85-bcee-5086a205be4f
Han, X.
0b4e4187-1116-4090-94f6-74ddaf02fb6d

Cai, X., Liang, J., Lin, Z., Deiterding, R., Qin, H. and Han, X. (2013) Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet. Journal of Aerospace Engineering, 28 (1), 1-11. (doi:10.1061/(ASCE)AS.1943-5525.0000376).

Record type: Article

Abstract

An open-source program implementing a block-structured adaptive mesh refinement method was adopted for the fine structure numerical simulation of detonation initiation in supersonic combustible mixtures. Simulations were conducted on a nested parallel computing system. The initiation process was specified as three stages, and their respective flow field characteristics were analyzed. Results indicate that a hot jet under specific conditions can have a similar effect as a pneumatic oblique bevel for inducing periodical shock-induced detonative combustion by a bow shock. The interaction of bow shock–induced combustion with the local detonation wave, produced by the reflection shock on the upper wall, can create a structure with two triple-wave points. The hot jet not only plays a role in the detonation initiation but also acts as a stabilizing control mechanism for detonation propagation. In the simulations in this study, the detonation wave propagates in an overdriven state initially and achieves self-sustaining motion after the shutdown of the hot jet. Subsequently, the final pisiform structure of typical stable Chapman-Jouguet detonation cells is formed.

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More information

Accepted/In Press date: 31 July 2013
Published date: 2 August 2013
Keywords: adaptive mesh refinement, supersonic combustible mixtures, hot jet, detonation initiation, pisiform detonation cell
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 380652
URI: https://eprints.soton.ac.uk/id/eprint/380652
ISSN: 0893-1321
PURE UUID: 1ac26669-8583-475f-9ec6-68ba01b69a3c
ORCID for R. Deiterding: ORCID iD orcid.org/0000-0003-4776-8183

Catalogue record

Date deposited: 08 Sep 2015 15:30
Last modified: 06 Jun 2018 12:20

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Contributors

Author: X. Cai
Author: J. Liang
Author: Z. Lin
Author: R. Deiterding ORCID iD
Author: H. Qin
Author: X. Han

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