Induction distance

In the overdriven state, the observed propagation velocity of the combustion front was found to be much higher than the steady-state velocity of spherical detonation. The overdriven state exists for only a short time, and the combustion front velocity then drops rapidly to the steady-state value. The rate at which this exceedingly high velocity decreases was found by experiment to be inversely proportional to the induction distance... 

Attenuating Materials. Effects of Detonation Induction Distances in Gases is discussed by M.W,Evans et al, jApplPhys 26, 1111-13... 

Attenuating materials. Effects of detonation induction distances in gases 1 AS06... 

To obtain a rough physical understanding of the mechanism of the instability, attention may be focused first on a planar detonation subjected to a one-dimensional, time-dependent perturbation. Since the instability depends on the wave structure, a model for the steady detonation structure is needed to proceed with a stability analysis. As the simplest structure model, assume that properties remain constant at their Neumann-spike values for an induction distance after which all of the heat of combustion is released instantaneously. If v is the gas velocity with respect to the shock at the Neumann condition, then may be expressed approximately in terms of the explosion time given by equation (B-57) as Z = vt. From normal-shock relations for an ideal gas with constant specific heats in the strong-shock limit, the Neumann-state conditions are expressible by v/vq = po/p —... 

Retonation. A detonation which is delayed in developing, that is it does not start until the shock from a donor, thru a barrier, has proceeded for a distance known as induction distance , and then the detonation goes not only forward into fresh material, but also backward in the shocked material Ref Anon, Principles of Explosive Behavior , EngrgDesHndbk, AMCP 706-180 (1972), 12-15... 

Loren E. Bollinger, Michael C. Fong, and Rudolph Edse, Experimental Measurements and Theoretical Analysis of Detonation Induction Distances, ARS Journal, 1961, pp. 588-595. 

Loren E. Bollinger, Experimental Detonation Velocities and Induction Distances in Hydrogen-Air Mixtures, AIAA Journal, 2 131-133 (1964). 

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