Mechanism of transition to detonation in unconfined volumes
| Autor: | I. S. Yakovenko, Alexey Kiverin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Shock wave
Coupling Deflagration to detonation transition 020301 aerospace & aeronautics Materials science Astrophysics::High Energy Astrophysical Phenomena Detonation Aerospace Engineering 02 engineering and technology Mechanics 01 natural sciences Physics::Fluid Dynamics Mechanism (engineering) Reaction rate Acceleration 0203 mechanical engineering Flame propagation 0103 physical sciences 010303 astronomy & astrophysics |
| Zdroj: | Acta Astronautica. 176:647-652 |
| ISSN: | 0094-5765 |
| DOI: | 10.1016/j.actaastro.2020.02.013 |
| Popis: | The paper is aimed at numerical study of one of the most hazardous events at a launch place: open space explosion of fuel air mixtures due to accidental loss of containments. A mechanism of transition to detonation in the process of unconfined flame propagation is proposed. It is shown that the detonation onset takes place as a result of local exponential growth of unstable short-wavelength perturbations. Exactly the same mechanism is known to be responsible for the self-similar flame acceleration, however the detonation can arise only in the case of extremely high reaction rate. High reaction rate defines a coupling of the accelerating flamelets with diverging shock waves that leads to the detonation onset. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect