Self-evaluation, sustainable development

Fast turbulent deflagrations often transit spontaneously to detonations. For fully developed self-sustained detonation, boundary conditions and confinement play minor roles. The Chapman-Jouguet velocity and overpressure are based on the energetics of the mixture and can be evaluated from equilibrium thermodynamic computations. During the onset of detonation, the transient peak overpressures developed can be much higher than the equilibrium detonation pressures. Transition from deflagration to detonation is to be avoided whenever possible because of this extremely high pressure transient at the onset of detonation. 

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