提高固体推进剂的点火和燃烧性能,包括氧化剂内含有Al粒子的固体推进剂
Ruixuan Xu1, Minghui Yu1, Zhihua Xue1
1Science and Technology on Combustion, Internal Flow and Thermo-Structure Laboratory, Northwestern Polytechnical University, Xi'an 710072, China.
ACS applied materials & interfaces
|November 17, 2023
概括
这项研究开发了新的核心外 (Al) /氧化剂复合材料,以增强固体推进剂的燃烧. 这些复合材料显著改善了能量释放,减少了点火延迟,并降低了压力指数,以获得高效的推进剂性能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 燃烧科学 燃烧科学
背景情况:
- (Al) 的燃烧效率对于高能固体推进剂至关重要.
- 传统的Al粉分散限制了氧化剂接触,导致不完全燃烧和高压指数.
研究的目的:
- 设计具有受控接口接触的Al/氧化剂复合材料,以改善固体推进剂燃烧.
- 研究核心外结构对推进剂性能指标的影响.
主要方法:
- 使用喷雾干燥制备Al@HMX,Al@AP和AP@Al核心外复合材料.
- 制造包含这些复合材料的固体推进剂.
- 燃烧性能的表征,包括爆炸热量,点火延迟,燃烧速率和压力指数.
主要成果:
- 修改后的推进剂显示爆炸热量增加了15% (5890 J g-1),点火延迟减少了65% (58 ms).
- 燃烧速率通过调节接口接触来调节 (4.56-5.79 mm s-1 在 1 MPa)
- 最低的压力指数 (0.19在1-15MPa范围内) 是通过Al@HMX和AP@Al复合材料实现的.
- 抑制了Al聚合,减少了未反应的Al含量,表明燃烧效率有所提高.
结论:
- 核心外Al/氧化剂复合材料提供精确的界面控制,显著提高固体推进剂燃烧效率.
- 这些工程复合材料提供了一个可行的策略来调节推进剂性能并实现更高的能量输出.
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