Effect of Graphene Doping on Laser Ignition Performance of B/KNO3/PF
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摘要:为探索常压下石墨烯（Graphene）掺杂对B/KNO3/PF点火和燃烧性能的影响，采用湿混法和冷冻干燥法分别制备了不同石墨烯掺杂量的Graphene/B/KNO3/PF，并使用光电探测器和高速摄影研究了石墨烯掺杂量和装药密度对点火延迟时间和燃烧速度的影响规律。结果表明：相对于冷冻干燥法，湿混法制备的Graphene/B/KNO3/PF混合均匀且燃烧速度更高。随着石墨烯掺杂量（0~2 wt%）的增加，Graphene/B/KNO3/PF的平均燃烧速度先增大后减小。装药密度为1.5g?cm-3时，0.8wt%石墨烯掺杂量的Graphene/B/KNO3/PF燃烧速度最大（20.3 mm?s-1），与B/KNO3/PF（14.6 mm?s-1）相比增加了39.0%；在装药密度0.8~1.7 g?cm-3范围（0.8 wt%石墨烯掺杂量）内，Graphene/B/KNO3/PF药柱平均燃烧速度随着装药密度的增大而减小。
Abstract:To explore the influence of graphene doping on the ignition and combustion performance of B/KNO3/PF under normal pressure, Graphene/B/KNO3/PF with different doping ratios was prepared using wet mixing and freeze-drying methods, and the impacts of graphene doping content and charge density on ignition delay time and burning rate were studied using photodetectors and high-speed photography. The results show that, compared to the freeze-drying method, the mixing uniformity and burning rate of Graphene/B/KNO3/PF prepared by the wet mixing method are higher. With the increase of graphene doping content (0~2 wt%), the average burning rate of Graphene/B/KNO3/PF increases first and then decreases. When the charge density is 1.5 g?cm-3 and the graphene doping content is 0.8 wt%, the burning rate is the highest, at 20.3 mm?s-1, which is an increase of 39.0% compared to B/KNO3/PF (14.6 mm?s-1). Within the range of charge density of 0.8~1.7g?cm-3 (graphene doping content is 0.8wt%), the average burning rate of Graphene/B/KNO3/PF decreases as the charge density increasing.
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