Influence of the thickness and absorption coefficient of a copper oxide film on the ignition delay of PENT by a laser pulse

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• 作者：A. V. Khaneft ; V. A. Dolgachev ; A. S. Zverev…
• 关键词：modeling ; absorbing film ; laser pulse ; ignition ; PETN
• 刊名：Combustion, Explosion, and Shock Waves
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：52
• 期：1
• 页码：91-95
• 全文大小：313 KB
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  11.A. V. Khaneft and V. A. Dolgachev, “Simulation of Initiation of PETN by a Nanosecond Laser Pulse in the Weak Absorption Region,” Fiz. Goreniya Vzryva 50 (1), 115–123 (2014). [Combust., Expl., Shock Waves 50 (1), 105–112 (2014).]
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• 作者单位：A. V. Khaneft (1) (2)
  V. A. Dolgachev (1)
  A. S. Zverev (1) (3)
  A. Yu. Mitrofanov (1) (3)
  
  1. Kemerovo State University, Kemerovo, 650043, Russia
  2. Tomsk Polytechnic University, Tomsk, 634050, Russia
  3. Yurga Technological Institute, Tomsk Polytechnical University, Yurga, 652055, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mechanics
  Mechanics, Fluids and Thermodynamics
  Physical Chemistry
  Vibration, Dynamical Systems and Control
  Engineering, general
  Russian Library of Science
  
• 出版者：Springer New York
• ISSN：1573-8345

文摘

Numerical modeling of PETN ignition by a copper oxide film absorbing laser radiation has been performed. The calculation results showed the presence of a minimum in the curve of the dynamic delay of PETN ignition by a rectangular laser pulse versus thickness of the absorbing film. This effect is due to the fact that when the film thickness is commensurate with the reciprocal of the absorption coefficient, the amount of heat generated in the thin film due to the multiple reflection of the light flux is proportional to its thickness. Therefore, the smaller the film thickness, the more time is required to heat it to the ignition temperature of PETN. In the case of a thick film, additional energy and time are required to heat its cold part to the ignition temperature of PETN.