About power thresholds, criteria, kinetics and mechanisms of ignition of explosives by laser pulses and pulsed electron beams; Известия вузов. Физика; Т. 49, № 10

About power thresholds, criteria, kinetics and mechanisms of ignition of explosives by laser pulses and pulsed electron beams; Известия вузов. Физика; Т. 49, № 10

Bibliographic Details
Parent link:Известия вузов. Физика: научный журнал/ Национальный исследовательский Томский государственный университет (ТГУ).— , 1957-
Т. 49, № 10.— 2006.— [С. 200-203]
Other Authors: Lisitsyn V. M. Viktor Mikhailovich, Oleshko V. I. Vladimir Ivanovich, Tsipilev V. P. Vladimir Papilovich, Yakovlev A. N. Aleksey Nikolaevich
Summary:Заглавие с экрана
Authors of this work carry out the analysis of applicability frameworks of various ignition criteria for modelling representatives of initiating explosives, secondary explosives and pyrotechnic mixed structures. It is established, that ignition criterion is energy of a pulse which value corresponds 50 % of ignition probability at short time of influences and the small sizes of a beam on a surface of substance, and in case a large sizes of beam - density of energy. In the field of long time the ignition criterion is power or density of power accordingly. It is necessary to understand values of energy W05 as power thresholds of ignition (PTI), density of energy Н05, capacities I05 and density of capacity q05, corresponding to 50% of a level on a probability curve of initiation. Which of these parameters is most informative depends that is criterion of ignition in different experimental situation. PTI is complex function of many parameters (duration of an influencing pulse τp, characteristic relaxation time of external excitation tr, diameter of a beam dn, refraction n 0, absorption μ and dispersion β coefficients of explosives, density of substance, dispersivity of explosive powders, pressure of molding and mass molding of explosive powders) and this circumstance is the reason of strongly difference in value of thresholds of various authors in experiences. In turn, criteria of ignition are determined by ratio between space-time parameters of an external influencing pulse and space-time scales of relaxation, which are typical for investigated sample in concrete conditions of experience. Some results of study of PTI at condition dependence on extended influence are presented in Fig. 1.
Language:English
Published: 2006
Subjects:
электронный ресурс
труды учёных ТПУ
лазерные импульсы
взрывчатые вещества
кинетика
Online Access:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.630.4611&rep=rep1&type=pdf
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=649873

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