By Roger Cheret
This paintings marks a degree within the evolution of a systematic and technical box which has been constructed by means of the Commissariat a l'Energie Atomique (CEA) over a number of many years. Many participants of the workers of the CEA have gained re nown during this box, and their paintings has introduced it to the excessive measure of excel lence for which it's the world over famous this day. those scientists needed to reflect on each element of the sphere, because it involved: modeling, which has recourse to fluid thermodynamics, molecular phys ics, and chemistry; numerical assessment, which will depend on mathematical research and knowledge processing; and experiments within the firing region, which require particular pressure turbines and instrumentation. when this ebook is a testomony to the task and good fortune of employees of the CEA, it additionally experiences a host ofthe advances made within the self-discipline. How ever, it's not meant to be an exhaustive account of these advances; it really is assumed that the reader can, if wanted, seek advice the normal monographs, and newer, extra really expert works (notably W.C. Davis and W. Fickett, and C.L. Mader). The background of the self-discipline is fascinating in itself, and in addition as an illustra tion of the motives which result in development in a coherent physique of clinical paintings. I should still wish to make a few reviews in this growth, of which there's a desirable precis within the creation, and as a way to determine principally during the work.
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Extra info for Detonation of Condensed Explosives
The intersection of (H) and p = Po is defined by f(v) == e(v, Po, 1) - e(vo, Po, 0) - Po(vo - v) = 0. 3) of Appendix A, we have oe(v, Po, 1) f '(v) -- ~ uV + Po -- [T cpc v cp - op ~(v, e, 1) Cv ue ] P=Po . 40 II. 16b), f'(v) is positive with the result that the maximum off(v) in the band v < Vo is f(vo) = eA - eo. 36) < e(vo, Po, 0). 36). 36) point B belongs to (H+). 5. Positive of the detonation arc (H+) of the Crussard curve projected on plane (v, p) in the case eA < eo. 3. Considerations Specific to Detonations 41 be the corresponding point on (H).
2%). 7 recapitulates certain of the results presented in [13J for two experiments on convergent spherical detonation in a solid cyclonite (RDX)based composition such that D~ = 8765 m/s. 3D~ is observed. The two sets of results given above obviously show that the various ob- 1800 Dm/s o 15000 • • 14 13000 12000 e • • 8000~ o o 300 mm diameter sphere • 280 mm diameter sphere ~ 0 . •• ~. 7. Velocity D of convergent spherical detonation in a cyclonite (RDX)based solid explosive (D~ = 8765 m/s) as a function of the radius X of the wave.
Properties of the Crussard Curve (H) 35 (iv) Using the inequality (II. 16c) in (IU9a), and then the inequality (II. 23), it can be demonstrated successively that a C-J detonation confirms v 1 +:21 ( 1- vo) G > 0, d2p dv 2 > 0. 4. 1. In particular, when Il-+ 00, the point D' tends toward the point at infinity (v = vD /4 - 0, P = +(0). 1. 3. 5. 27) eA - eo =1= 0, which is the equivalent of saying that A does not belong to (H). 36 II. 3. The four possible configurations for the intersection, on surface ~, of the Hugoniot curve (hD) and the (R~) curve, projected on the plane (v, pl.