| Autor: |
Kiverin, A. D., Medvedkov, I. S., Yakovenko, I. S. |
| Zdroj: |
Russian Journal of Physical Chemistry B: Focus on Physics; Dec2022, Vol. 16 Issue 6, p1075-1079, 5p |
| Abstrakt: |
This paper analyzes the critical conditions achieved immediately before the deflagration-to-detonation transition (DDT) in the process of free flame propagation in an unconfined space. It is demonstrated that the so-called folding factor characterizing the degree of flame surface development is not sufficient to define the conditions for the DDT transition. This is primarily due to the fact that the mechanism of transition to detonation is completely determined by the evolution of the flame at the stage preceding the transition. The nonlinear nature of the development of the flame front during its acceleration determines the generation of shock waves propagating in the transverse direction (along the flame front). The interaction of these shock waves with the front leads to their amplification and creates conditions for the formation of a detonation wave. In this case, scenarios are possible when a relatively high degree of surface development is achieved, but the intensity of the process is insufficient to generate strong shock waves that can lead to a transition to detonation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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