Detonation wave curvature of PBXN-111

Forbes, J. W.; Lemar, E. R.; Baker, R. N.

doi:10.1063/1.46238

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the explosive could be detonated in thicknesses of 12.7 rrmt or greater if it were confined by heavy brass plates; see Appendix A. The measured failure diameter of PBXN-111 is 37.1 mm, 15 which agrees favorably with our data if a two to one ratio between failure diameter and thickness is assumed.1 4 With the benefit of the conductivity results discussed later, it is known that the detonation may have been unstable in these tests, i.e., the wave may not have been fully detonating. These observations are consistent with the calculations by Kennedy which indicate that the chemical reaction of PBXN-111 may be only 12 percent complete at the sonic surface, 1 6 whereas for an ideal explosive reaction would be complete.…”

Section: Detonation Stability In Sheets Of Pbxn-111mentioning

confidence: 97%

The Measurement of Electrical Conductivity in Detonating Condensed Explosives

Tasker¹,

Lee²,

Gustavson³

1993

View full text Add to dashboard Cite

Section: Detonation Stability In Sheets Of Pbxn-111mentioning

confidence: 97%

The Measurement of Electrical Conductivity in Detonating Condensed Explosives

Tasker¹,

Lee²,

Gustavson³

1993

View full text Add to dashboard Cite

“…The non-ideal model was calibrated by fitting th e slightly divergent flow th eo ry to the m easured charge diam eter effect d a ta (Malin et al 1957;Leiper & Cooper 1989;Forbes et al 1989), using the kinetic rate constants as unknow ns (see figure 1). The resu ltan t model was used to predict th e v ariatio n of wave stru ctu re w ith charge diam eter.…”

Section: Application To Steady State Detonationmentioning

confidence: 99%

Numerical modelling of detonation performance

Leiper¹

1992

Phil. Trans. R. Soc. Lond. A

View full text Add to dashboard Cite

Detonation performance is defined in terms of the steady state wave structure of the detonation front, and the initiation behaviour of the explosive. Some common techniques for modelling detonation performance are described, based on semi-analytic hydrodynamic and computational fluid dynamic reactive flow models. Accurate modelling of detonation performance is shown to require resolution of the reaction zone in the explosive, for non-ideal and for intrinsically unreactive systems. The ability of detonation models to predict steady state and initiation performance is discussed. Examples of resolve reaction zone models of explosives of varying degrees of ideality are presented. The sensitivity of predictions to primary data is examined for steady state reaction zone modelling of the insensitive explosive PBX W115, and Composition B3. Future directions for development of reactive flow models are examined. Particular emphasis is drawn to the need for more detailed temperature dependent kinetic schemes, and the inclusion of more detailed reaction geometries in such flow models.

show abstract

“…However, this analysis was based on a CJ detonation velocity predicted by a chemical equilibrium code [5] to be 0.5 mm.pxl higher than the infinite diameter value inferred from a linear extrapolation of the experimental detonation velocity data [6]. This makes its diameter effect curve (the dependence of steady-state detonation velocity D on charge diameter d in cylindrical geometry) concave up when plotted in the D vs d-1 plane, unlike those of ideal explosives which are usually linear or concave down, as summarised by Campbell and Engelke [7].…”

Section: Introductionmentioning

confidence: 99%

The Challenge of Non-Ideal Detonation

Kennedy¹

1995

J. Phys. IV France

View full text Add to dashboard Cite

: This paper will compare and contrast detonation in ideal and in highly non-ideal explosives. Ideal explosives, represented here by a TATB / binder system, have relatively flat velocity of detonation (VoD) versus inverse charge diameter relationships, and fail at VoDs only slightly below their ideal CJ values. Highly non-ideal explosives, such as the physically heterogeneous composites used both in Naval and in mining applications, display more complex VoD relationships, and greater deficits at failure. Indeed, the example chosen here of an ANFO / emulsion blend has a bi-linear diameter effect curve, with the VoD at failure being only 30% of its CJ value. These behaviours are interpreted by examining their reaction rate surfaces (namely the 3D relationship between pressure, extent of reaction and reaction rate). Many of the experimental tests in common use, and many models of the detonation process, rely on particular features of the reaction rate surface that are specific to ideal explosives. Such features are modified or absent from the surfaces for highly non-ideal explosives, with the result that the experimental tests can become either misleading or irrelevant, while the theoretical models are inappropriate.

show abstract

Detonation wave curvature of PBXN-111

Cited by 4 publications

References 0 publications

The Measurement of Electrical Conductivity in Detonating Condensed Explosives

The Measurement of Electrical Conductivity in Detonating Condensed Explosives

Numerical modelling of detonation performance

The Challenge of Non-Ideal Detonation

Contact Info

Product

Resources

About