Advertisement

Shock Waves

, Volume 5, Issue 1–2, pp 121–123 | Cite as

An experimental study of temperature structure of shock relaxation in air-dusty explosive media

  • S. Yang
  • R. Huang
  • S. Wang
  • Y. Gao
  • Q. Fan
Technical Note

Abstract

A transient optical-electrical two-color pyrometer combined with optical-fibers was utilized to measure the temperature of shock relaxation in air-dusty explosive media in tiny transparent tubes. The external and internal diameters of the tubes are 3.0 mm and 1.5 mm, respectively. The explosives coated on the inner wall of the tubes are RDX/Al 91/9 with a loading density of 9 kg/m3 initiated by an electric spark. The temperature profiles versus time at various stages during the ignition-to-detonation transition processes of the media are given and discussed in detail. It is shown that there is a special temperature structure of the shock relaxation in multiphase reactive media different from that of a detonation in condensed high explosives.

Key words

Dusty gas flows Relaxation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Cheng J, Fan Q, Gao Y (1987) Plastic detonating tubes. National Defence Industrial Press, ChinaGoogle Scholar
  2. He X, Han C, Kang S (1985) The measurement of detonation temperature of condensed explosives with two-color optical fiber pyrometer. Proceedings of the 8th Symposium on Detonation. pp314–321Google Scholar
  3. Lee John HS (1987) Dust explosion: an overview. Proceedings of the 16th Int. Symposium on Shock tubes and Waves. Aachen. pp21Google Scholar
  4. Shi H, Han C, Kang S, Huang L (1989) The studying of detonation temperature of solid high explosives. Proceedings of the 9th Symposium on Detonation. pp370–376Google Scholar
  5. Tang M (1989) Shock characteristics in a combustible air. J Explosion and Shock Waves 3:281–288Google Scholar
  6. Tulis AJ (1988) On the transition to detonation in burning molecular explosive-sensitized fuel powders dispersed in air. Proceedings of 19th Int. Annual ICT Conference V34Google Scholar
  7. Yang S, Wang S et al. (1990) The flame structure and the formation mechanism of detonation wave for the plastic shock tube system during deflagration to detonation transition process. J Explosion and Shock Waves 1:14–20Google Scholar
  8. Yang S (1990) Study on the detonation mechanism of low-loading density dusty explosives: the processes of ignition-to-detonation transition of explosives in plastic shock tubes. Ph.D. Thesis, Nanjing University of Science and TechnologyGoogle Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • S. Yang
    • 1
  • R. Huang
    • 2
  • S. Wang
    • 2
  • Y. Gao
    • 2
  • Q. Fan
    • 2
  1. 1.Changsha Institute of EngineeringChangshaChina
  2. 2.Nanjing University of Science and TechnologyNanjingChina

Personalised recommendations