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Acta Armamentarii ›› 2017, Vol. 38 ›› Issue (8): 1513-1519.doi: 10.3969/j.issn.1000-1093.2017.08.008

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Research on Output Performance of Al/KClO4 Igniter in Closed Bomb

LIANG Xiao-ai1, NIE Jian-xin1, WANG Shuai2, ZHANG Zhi-feng2, ZHANG Hai-jun1   

  1. (1.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;2.Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China)
  • Received:2017-01-10 Revised:2017-01-10 Online:2017-10-10

Abstract: The output performance of Al/KClO4 igniter is a key parameter for the overall design of pyrotechnically actuated separation device. In order to describe the output performance of Al/KClO4 igniter more accurately, an improved interior ballistics analysis model of Al/KClO4 is established by modifying the hypotheses of classical interior ballistics equations and introducing the correction coefficient of powder force. The Matlab numerical algorithm is written to calculate the pressure peak, pressure rise time and impulse per unit area of Al/KClO4 igniter in closed bomb. The changes of these parameters with charge mass and cavity volume are analyzed. And the calculated results are in good agreement with the experimental results. The results show that the pressure peak of Al/KClO4 igniter increases with the increase in charge mass, and decreases with the increase in cavity volume. In a small volume (<5 mL), the cavity volume is increased by two times, and the peak pressure is decreased by about 40%. Key

Key words: ordnancescienceandtechnology, pyrotechnicallyactuatedseparationdevice, Al/KClO4, igniter, pressure-timecurve, simulationcalculation

CLC Number: