Weak detonation

Weak detonation since (supersonic flow to supersonic)... 

Region II Pi < Pj supersonic flow to supersonic flow, weak detonation... 

Summarizing the experience with BG, Taylor (Ref 1, p 163) stated that a non-aerated expl tended to fail in propagation of deton when initiated by weak detonators well-aerated "creamy mixes with extremely fine bubbles tended to detonate at, or pick up to high vel, and gelatins of intermediate aeration tended to exhibit the low-vel regime. 

Fig Hugoniot curve iff111 = of reaction products, with sections corresponding to strong, Chapman—Jouguet, and weak detonations and deflagrations... 

The other waves are classified as follows weak detonations, strong detons, weak deflagrations and strong deflagrations (Ref 38,... 

The Zel dovich- van Neumann-Doering Model The Chapman- Jouguet Hypothesis and Pathological Weak Detonations... 

Strong and weak detonation waves are described in our writeup under Detonation, Strong and Weak , p D576... 

A.R. Ubbelohde, "Possibility of Weak. Detonation Waves . Ibid, pp 464- 67... 

Classification Weak deflagration Chapman-Jouguet deflagration Strong deflagration Weak detonation Chapman-Jouguet detonation Strong detonation... 

Deterioration was visible in all irradiated primers as color changes in expl and brass parts, corrosion of brass, and cracking of expl layers. As exposure of the production types increased, weak detonations indicating some degradation were detected while impact sensitivity was still above standard subsequent loss of charge occurred as sensitivity decreased, both effects being greatest in the No 26 primers... 

The experimental conditions determine whether a strong detonation, a Chapman-Jouguet wave, or a weak detonation will be observed at a given value of p. Under most experimental conditions, detonations are Chapman-Jouguet waves this topic will be discussed more fully in Section 6.2, since the reasoning involves concepts of the structure of the wave. 

Figure 2.5 shows that as the nomenclature implies, the pressure ratio and the velocity change across a strong detonation exceed those across a weak detonation. The strong detonation with p — oo and the isochoric weak detonation (t = 1), both of which propagate at infinite velocity (p = oo), represent unattainable limiting cases. 

FIGURE 6.2. Schematic diagram illustrating the properties of various Rayleigh lines. End states at points a, b, c, d correspond to strong and weak detonations and weak and strong deflagrations, respectively. 

Equation (7) shows that for a detonation (that is, for Mq > 1), equation (8) identifies the cold-boundary point [(tp, t, c) = (1,0,0)], while for a deflagration (that is, for Mq < 1), equation (9) represents the cold-boundary point. By using equation (7) and the results of Section 2.2 (for example. Figure 2.5), it can be seen that equation (10) is the hot-boundary point for a weak detonation or a strong deflagration and equation (11) is the hot-boundary point about T = 0, (p — (p+ (0) then yields the equidimensional equation... 

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