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Intensification of Chemically Assisted Melt-Water Explosive Interactions

机译：化学助熔水爆炸相互作用的加剧

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摘要

This paper investigates avenues for controlled initiation and augmentation of the mechanical and thermal energetic output of shock-triggered vapor explosions (VEs) with Al-GaInSn alloys; furthermore, enabling a means for impulsive hydrogen gas generation within milliseconds. Using a submerged electronic bridgewire detonator or rifle primer caps as the shock trigger for VE initiation, experiments were conducted with 10 g melt drops at initial temperature between 930 K and 1100 K, aluminum mass contents between 0.3 wt.% and 20 wt.%, and water temperatures between 293 K and 313 K. It was found that combined thermal-chemical Al-GaInSn-H_2O explosive interactions can readily be controllably induced via shocks and are of greater intensity than the pure (spontaneous) thermally driven explosions observed with unalloyed Sn and GaInSn. Shock pressures up to 5 MPa were recorded about 10 cm from the explosion zone; a factor of 5 higher than the ～1 MPa over pressures generated from spontaneous GaInSn-H_2O explosions reported in our previous study. Al-GaInSn-H_2O explosive interactions also exhibited rapid enhancements to the "impulse" H_2 production rate. Hydrogen/vapor bubble volumes up to 460 ml were observed approximately 4 ms after the explosion, equating to a mechanical work and instantaneous power output of 47J and 11.75 kW, respectively. In comparison with available, analogous, triggered-explosion studies with Al melt drops, our Al-GaInSn alloy melt at 1073 K generated up to 18 times (～2000%) more hydrogen per gram of aluminum when compared with experiments with molten Al at a much higher melt temperature of 1243 K.
机译：本文研究了用Al-GaInSn合金控制激波触发的蒸气爆炸（VE）的机械和热能输出的受控引发和增强的途径。此外，提供了一种在毫秒内产生脉冲氢气的装置。使用浸没式电子桥丝雷管或步枪底漆帽作为引发VE的电击触发器，在初始温度930 K和1100 K之间，铝质量含量在0.3 wt。％和20 wt。％之间，以及水的温度介于293 K和313 K之间。人们发现，热化学结合的Al-GaInSn-H_2O爆炸性相互作用可以很容易地通过冲击来控制，并且其强度要比非合金Sn观察到的纯（自发）热驱动爆炸高。和GaInSn。在距爆炸区约10 cm处记录到高达5 MPa的冲击压力；在我们先前的研究中报道，自发GaInSn-H_2O爆炸产生的压力比〜1 MPa高出5倍。 Al-GaInSn-H_2O爆炸性相互作用也表现出对“脉冲” H_2产生速率的快速增强。爆炸后约4毫秒观察到高达460 ml的氢气/蒸气气泡体积，分别相当于机械功和47J和11.75 kW的瞬时功率输出。与可用的铝熔滴类似的触发爆炸研究相比，我们在1073 K的Al-GaInSn合金熔体每克铝产生的氢比在50℃下的熔融Al实验多出18倍（〜2000％）。更高的熔体温度1243K。

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  • 来源
    《Journal of Heat Transfer》 |2017年第4期|042004.1-042004.10|共10页
  • 作者

    Anthony A. Sansone; Rusi P. Taleyarkhan;

  • 作者单位

    School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907;

    School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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