We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Numerical Investigation of the Detonation Cell Bifurcation with Decomposition Technique.
- Authors
Pavalavanni, Pradeep Kumar; Kim, Jae-Eun; Jo, Min-Seon; Choi, Jeong-Yeol
- Abstract
Bifurcation of the characteristic cells into multiple smaller cells and decay of those cells into single large characteristic cell is observed frequently. In the present study the bifurcation phenomenon of the detonation front is investigated for marginally unstable detonations using decomposition technique. Numerical analysis is carried out with detailed chemical kinetics for detonation propagation in H2/O2 mixtures at 10 kPa. The dynamic characteristics of the instability at the detonation front, such as the local oscillation frequency and the coherent spatial structure of the oscillation are also studied with dynamic mode decomposition (DMD) technique. The coherent structures of the primary and secondary detonation cells are analyzed during the cell bifurcation process and the mechanism in which the secondary cells are formed is investigated. It is demonstrated that the modal analysis categorizes the instability phenomena clearly and can be effectively utilized to identify the origin and source of the instability.
- Subjects
FREQUENCIES of oscillating systems; CHEMICAL kinetics; MODAL analysis; NUMERICAL analysis; EXPLOSIVES; OSCILLATIONS
- Publication
Aerospace (MDPI Publishing), 2023, Vol 10, Issue 3, p318
- ISSN
2226-4310
- Publication type
Article
- DOI
10.3390/aerospace10030318