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oe1(光电查) - 科学论文

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  • Laser Ignition and Flame Temperature for Low-Density Mixtures of Lignite Coal and Pentaerythritol Tetranitrate (Petn)

    摘要： We have studied laser ignition (1064 nm, 120 μs) of mixtures of lignite coal (brown coal) particles of size ≤0.1 mm and pentaerythritol tetranitrate (PETN) additives. We established that as the amount of PTEN additives increases in the range 0–50 wt.%, the critical ignition energy density of the mixtures decreases monotonically from 2.9 to 2.0 J/cm2. We used spectral pyrometry to determine that the ?ame temperature for the mixture increases from 1800 K to 2100 K.

    关键词： laser ignition,pentaerythritol tetranitrate (PETN),spectral pyrometry,lignite (brown coal),spectroscopy

    更新于2025-09-23 15:21:01

  • Laser pulse initiation of RDX-Al and PETN-Al composites explosion

    摘要： The explosive thresholds H cr of the composites cyclotrimethylenetrinitramine (RDX)-Al and pentaerythritol tetranitrate (PETN)-Al under the action of neodymium laser (wavelength 532 nm, pulse duration 14 ns) were experimentally determined for the first time as a function of the aluminum content. The experiments were performed using aluminum nanopowder with average diameter 100 nm. The gas-dynamic energy losses were prevented. The minimal thresholds achieved in the experimental conditions were determined that are H cr = 1 J/cm 2 for the composites RDX-Al at the mass fraction of Al 0.2% and H cr = 0 . 33 J/cm 2 for PETN-Al composites at aluminum mass fraction 0.1%.

    关键词： Laser initiation,Pentaerythritol tetranitrate,Cyclotrimethylenetrinitramine,Aluminum,Ultrafine particles,RDX

    更新于2025-09-19 17:13:59