Quasi-Detonation in Tubes and Ducts

The throttling opening of do diameter can be considered as a single turbulence promoter. 

Quasi-detonation combustion regimes of mixtures with smaller H2 concentration (14%) in confined volumes were observed during large-scale experiments [14]. Again, this demonstrates the increase in dangerous blast probability with the growth of the mixture volume. 

two large spaces connected with each other by throttling openings and filled with FAM create conditions for a damaging blast process in the accepter space. 

The totality of results collected in [8-10, 14] shows that under certain conditions there is a possibility of special combustion regimes that noticeably differ from detonation and deflagration in pressure and/or velocity values. Following [1, 15] let 

In some experiments, square ducts are encumbered with an assembly of rods as it is shown in Fig. 5.5b. This arrangement is described by flow dimension D and distance between the rods Z. Often Z = D (see Figs. 5.5, 5.6). 

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