含铝固液混合燃料老化性能研究

Aging Properties of Solid-liquid Mixed Fuels Containing Aluminum

为了研究某含铝固液混合燃料的老化性能,采用71℃高温加速老化试验方法,对燃料老化前后的燃烧热、机械感度、结构形貌及安定性进行了对比。结果表明,该含铝固液混合燃料在71℃下储存28 d后,燃烧热下降了0.86%;摩擦感度从8%下降到5%,撞击感度无变化;混合燃料的间隙略有减小,但整体黏结结构并未被破坏;加热速率趋于0时的起始分解温度和峰值温度比老化前分别提前了7.1℃和1.6℃,活化能降低10.4 k J/mol。与老化前相比,老化后燃料的各性能变化幅度较小,仍然满足燃料的使用要求,具有较好的长期储存性。

The accelerated aging tests at 71℃ were carried out in order to investigate the aging performance of a kind of solid-liquid mixed fuel containing aluminum. Heat of combustion,mechanical sensitivity,micro structure and thermal stability were measured before and after aging. Results show that after 28-day aging test at 71 ℃,the heat of combustion decreases by 0. 86%,the friction sensitivity decays from 8% to 5%,while the impact sensitivity does not change. The gaps of the fuel become slightly smaller,but the overall bonding structure is not damaged. When the heating rate tends to zero the decomposition initial temperature and peak temperature shift by 7. 1 ℃ and 1. 6 ℃ downwards,respectively. The apparent activation energy reduces by 10. 4 k J / mol. In comparison with the fuel before aging,the performance of the aged fuel has little change and remains a good storage performance,still meeting the requirement.