Detonation transverse waves, role

In Chapter 8.5, B. Veyssiere exposes the state of knowledge in detonations. Particular features of the complex multidimensional structure of detonations are presented in relation with the recent results obtained either by nonintrusive optical diagnostics or numerical simulations from high performance calculations. The role of transverse waves in detonation propagation, the existence of correlations between the characteristic dimension of the cellular structure and the critical conditions for detonation initiation and detonation transmission, and the influence of the nonmonotonous heat release process behind the front are examined. Recent developments in the study of spinning detonations are also discussed. 

Understanding the complex physical, chemical, and thermodynamic phenomena associated with liquid-phase injection, mixing and ignition, those which influence rapid development of detonation waves, and the role of transverse waves in the detonation process. 

In mixtures near the limit, the shock wave and the flame separate momentarily, and the gases behind the shock are then the seat of vibratory phenomena, not only transverse but also longitudinal (of the same frequency as in the burnt gases). It would appear from this that such phenomena, but at even higher frequency, exist in the gas layer separating the shock wave and the flame of detonations propagating under conditions far removed from the limits, and that they play an important role in the coupling of the shock and the flame... 

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