Stability and Instability of Detonation

Detonation (Explosion, Deflagration and Combustion), Stability and Instability of. 

Zel dovich noted (Ref 6) that in order for a stationary burning rate of propellant to be recovered after a pressure fluctuation, enough time must elapse to allow a layer of the propellant to heat up. When the pressure varies rapidly, and there is insufficient time for the solid to heat up, the derivative du/dp (rate of burning velocity increase for a given pressure rise) and the pressure exponent become larger than during steady burning. Therefore, in a small chamber at low pressure, when the characteristic hydrodynamic time of pressure variation is shorter than the burn-up time of the heated layer, stability can be lost 

A stability analysis for Chapman-Jfouguet detonations made by Pukhnachev (Ref 6a) to clarify the development of phenomena leading to spinning detonations is discussed under Detonation, Spin (Spinning or Heli-coidal Detonation) 

Such secondary explosives may be more susceptible than primary expls to combustion instability. Thus, the combustion temperatures for K Picrate and Tetryl at atmospheric pressure are 2800 and 2400°K, respectively, whereas the maximum comb 

The study, by Dabora et al (Ref 11), of detonating H2-O2 mixtures surrounded by a compressible medium such as an inert gas is mentioned under Detonation, Spin (Spinning or Helicoidal Detonation). In such confinement the detonation proceeds more slowly than if confined by a rigid wall. 

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A number of papers on stability and instability of detonation, etc were presented at the 12thSympCombstn in 1968 at Poitiers. They are listed here as Refs 15 to 22, incl. Of these papers the one by Erpenbeck (Ref 22) critically reviews various theoretical... 

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