Experimental study on multiple-pulse performance characteristics of ammonium perchlorate/aluminum powder rocket motor
Experimental study on multiple-pulse performance characteristics of ammonium perchlorate/aluminum powder rocket motor
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高氯酸铵/铝粉火箭发动机多脉冲性能特性实验研究
DOI：
10.1016/j.actaastro.2016.11.014
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发表时间：
2017-04-01
影响因子：
3.5
通讯作者：
Cai, Yupeng
中科院分区：
文献类型：
--
作者：
Li, Yue;Hu, Chunbo;Cai, Yupeng
基于粉末火箭测试系统，对高氯酸铵/铝粉火箭发动机的性能特性进行了实验研究。采用双组元推进剂供粉系统进行了间隔1小时的三脉冲实验和间隔15秒的四脉冲实验。实验验证了粉末火箭多脉冲运行和同步供粉方法的可行性。相应地分析了多脉冲性能特性。结果表明，氧化剂粉末流化气体质量流量为2.5 g/s，燃料粉末流化气体质量流量为2.0 g/s时，电机启动稳定。采用相对标准偏差来描述脉冲的重复性特征。高氯酸铵和铝活塞速度的相对标准偏差为0.072和0.007，氧化剂-燃料进料比的相对标准偏差为0.052。该电机在多脉冲测试中表现良好，燃烧室压力、启动响应和燃烧效率具有良好的重复性。遇到了低频燃烧压力振荡，频率为 3.64.2 Hz，振幅高达平均燃烧器压力的 18.7%。这种现象在第一个脉冲时出现严重，然后在随后的脉冲时减轻。测试结果的进一步分析表明，增加腔室压力可以改善振荡。
The performance characteristics of ammonium perchlorate/aluminum powder rocket motor were investigated experimentally based on a powder rocket testing system. Three-pulse experiment with one hour interval and four-pulse experiment with 15 s interval were conducted with a bi-propellant powder feed system. The experiments demonstrate the feasibility of the powder rocket for the multiple-pulse operation and the synchronization of powder feed method. The multiple-pulse performance characteristics were analyzed accordingly. It shows that the motor initiates steadily with the mass flow rate of 2.5 g/s for oxidizer powder fluidization gas and 2.0 g/s for fuel powder fluidization gas. The relative standard deviation was adopted to describe the repeatability characteristics of the pulses. The relative standard deviation of ammonium perchlorate and aluminum pistons velocity is 0.072 and 0.007, and that of oxidizer-fuel mass feed ratio is 0.052. The motor performed well with good repeatability of combustor pressure, start-up response and combustion efficiency during the multiple-pulse tests. Low frequency combustion pressure oscillations, 3.64.2 Hz with amplitudes up to 18.7% of mean combustor pressure, were encountered. The phenomenon appeared seriously at first pulse, then alleviated at the following pulses. Further analysis of test results showed that increasing chamber pressure could ameliorate the oscillation.