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A computational fluid dynamic investigation of inhomogeneous hydrogen flame acceleration and transition to detonation
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Khodadadi Azadboni, Reza, Heidari, Ali and Wen, Jennifer X. (2018) A computational fluid dynamic investigation of inhomogeneous hydrogen flame acceleration and transition to detonation. Flow, Turbulence and Combustion . doi:10.1007/s10494-018-9977-4 ISSN 1386-6184.
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Official URL: http://dx.doi.org/10.1007/s10494-018-9977-4
Abstract
Gas explosions in homogeneous reactive mixtures have been widely studied both experimentally and numerically. However, in practice and industrial applications, combustible mixtures are usually inhomogeneous and subject to vertical concentration gradients. Limited studies have been conducted in such context which resulted in limited understanding of the explosion characteristics in such situations. The present numerical investigation aims to study the dynamics of Deflagration to Detonation Transition (DDT) in inhomogeneous hydrogen/air mixtures and examine the effects of obstacle blockage ratio in DDT. VCEFoam, a reactive density-based solver recently assembled by the authors within the frame of OpenFOAM CFD toolbox has been used. VCEFoam uses the Harten–Lax–van Leer–Contact (HLLC) scheme fr the convective fluxes contribution and shock capturing. The solver has been verified by comparing its predictions with the analytical solutions of two classical test cases. For validation, the experimental data of Boeck et al. (1) is used. The experiments were conducted in a rectangular channel the three different blockage ratios and hydrogen concentrations. Comparison is presented between the predicted and measured flame tip velocities. The shaded contours of the predicted temperature and numerical Schlieren (magnitude of density gradient) will be analysed to examine the effects of the blockage ratio on flame acceleration and DDT.
| Item Type: | Journal Article | ||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Liquefied natural gas, Hydrogen flames, Combustion engineering, Hydrogen -- Thermal properties, Inhomogeneous materials, Numerical analysis, Combustion -- Mathematical models | ||||||
| Journal or Publication Title: | Flow, Turbulence and Combustion | ||||||
| Publisher: | Springer Netherlands | ||||||
| ISSN: | 1386-6184 | ||||||
| Official Date: | 1 September 2018 | ||||||
| Dates: |
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| DOI: | 10.1007/s10494-018-9977-4 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 11 September 2018 | ||||||
| Date of first compliant Open Access: | 12 September 2018 | ||||||
| RIOXX Funder/Project Grant: |
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