AP/HTPB复合底排推进剂激光点火燃烧特性

基于实验研究高氯酸铵与端羟基聚丁二烯(AP/HTPB)复合推进剂的点火燃烧性能，有助于揭示燃烧一致性机理，进而改进燃烧特性，提高底排增程弹射击效能。激光具有能量可调与高输出稳定性的优点，是最佳的含能材料点火燃烧实验的能量源。利用大功率固体激光系统，并借助高速录像系统，研究了AP/HTPB复合底排推进剂试样的点火延迟时间，点火延迟时间随激光强度的增加先显著缩短，继而趋于平缓；基于试样燃烧序列图像及图像处理技术，计算出了复合推进剂的燃速约为3.41 mm/s。基于含能材料一维激光点火模型，对试样的点火燃烧进行数值模拟，点火延迟时间的计算结果与实验情况比较吻合，并得到了激光作用的推进剂表面温度随时间及激光强度的变化历程。

Abstract

It is contributed to reveal the combustion consistent mechanism of ammonium perchorate and hydroxyl-terminated pdybutadiene (AP/HTPB) composite propellant by studying its characteristics of ignition and combustion based on experiment. The firing efficiency of base bleed projectile will increase by improving combustion characteristic. Laser has the advantages of adjustable energy and high output stability, so it is the best energy source for energetic materials ignition and combustion test. The ignition delay time of AP/HTPB composite propellant samples is researched by using high power solid-state laser and high speed video system. The ignition delay time is dramaticlly shortened with laser intensity increasing and then tends to be gentle. The combustion speed is calculated as 3.41 mm/s based on combustion ordinal images and image processing technology. Numerical simulations of ignition and combustion of the test samples are conducted by building the one-dimensional laser ignition model for energetic materials. The calculated results of ignition delay time are in accordance with the test greatly, and the temperature variation with time and intensity is obtained.

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张领科, 赵威, 吴立志. AP/HTPB复合底排推进剂激光点火燃烧特性[J]. 中国激光, 2013, 40(8): 0803005. Zhang Lingke, Zhao Wei, Wu Lizhi. Ignition and Combustion Characteristics of AP/HTPB Composite Propellant by Laser[J]. Chinese Journal of Lasers, 2013, 40(8): 0803005.

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