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Activated charcoal - A novel burn rate enhancer of aluminized composite propellants

机译：活性炭-一种新型的铝化复合推进剂燃烧速率增强剂

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摘要

This paper reports the discovery of activated charcoal as an effective burn rate enhancer of aluminized composite solid propellant. Experiments were carried out using a strand burner at pressures ranging from 10 to 70 bar with varying fractions of activated charcoal. The results show that with the addition of activated charcoal in an aluminized composite propellant higher burn rates (in excess of 25 mm/s at 70 bar) were obtained. This paper also explores the possibility of further enhancing the burn rates of aluminized composite propellant by using iron oxide along with activated charcoal. Burn rates recorded with iron oxide and activated charcoal both present in the propellant were in excess of 50 mm/s at 70 bar. It was noticed that these high burn rates were accompanied by a higher (0.65) pressure index of combustion. A series of experiments were designed to understand the burn rate enhancement with activated charcoal in aluminized composite propellant. TGA and DSC tests were carried out on AP pellets with and without activated charcoal to detect any condensed phase activity of activated charcoal. These tests did not show any significant difference between the AP pellets with and without activated charcoal. The AP pellets with and without activated charcoal were also burnt in a strand burner to understand if any gas phase reaction was being catalyzed by activated charcoal. AC does not enhance any gas phase activity while addition of AC in AP increased the LPDL of AP and reduced the burn rate. Lastly, sandwich propellant with activated charcoal at the interface was prepared to determine if interface reactions were being affected with the addition of activated charcoal. It has been observed that with the addition of activated charcoal at the AP-binder interface the burn rates are higher than those recorded without activated charcoal at the AP-binder interface.
机译：本文报道了活性炭作为铝化复合固体推进剂有效燃烧速率增强剂的发现。使用绞线燃烧器在10至70 bar的压力范围内使用不同比例的活性炭进行实验。结果表明，在铝化复合推进剂中添加活性炭可获得更高的燃烧速率（在70 bar下超过25 mm / s）。本文还探讨了通过结合使用氧化铁和活性炭进一步提高铝化复合推进剂燃烧速率的可能性。两种同时存在于推进剂中的氧化铁和活性炭记录的燃烧速率在70 bar下超过50 mm / s。注意到这些高燃烧率伴随着较高的燃烧压力指数（0.65）。设计了一系列实验来了解活性炭对铝化复合推进剂燃烧速度的提高。在有和没有活性炭的AP颗粒上进行TGA和DSC测试，以检测活性炭的任何凝结相活性。这些测试没有显示有和没有活性炭的AP颗粒之间的任何显着差异。也将具有和不具有活性炭的AP颗粒在链式燃烧器中燃烧，以了解是否有任何气相反应被活性炭催化。 AC不会增强任何气相活性，而在AP中添加AC会增加AP的LPDL并降低燃烧速率。最后，制备在界面处带有活性炭的夹心推进剂，以确定添加活性炭是否会影响界面反应。已经观察到，在AP-粘合剂界面处添加活性炭的燃烧速率高于在AP-粘合剂界面处未记录活性炭的燃烧速率。

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  • 来源
    《Combustion and Flame》 |2010年第6期|p.1202-1210|共9页
  • 作者

    Sumit Verma; P.A. Ramakrishna;

  • 作者单位

    Department of Aerospace Engineering, IIT Madras, Chennai 600 036, India;

    Department of Aerospace Engineering, IIT Madras, Chennai 600 036, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    composite propellant combustion; burn rate enhancer;

    机译：复合推进剂燃烧燃烧率增强剂;

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