利用水下爆炸和猛度实验测试了添加不同钛粉含量的乳化炸药的爆轰性能,并与含铝乳化炸药进行了对比;运用微量量热仪对不同乳化炸药样品进行热分析实验,通过计算得到它们的热分解动力学参数。结果表明:含钛量为5%的乳化炸药,比冲量、冲...利用水下爆炸和猛度实验测试了添加不同钛粉含量的乳化炸药的爆轰性能,并与含铝乳化炸药进行了对比;运用微量量热仪对不同乳化炸药样品进行热分析实验,通过计算得到它们的热分解动力学参数。结果表明:含钛量为5%的乳化炸药,比冲量、冲击波能、气泡能较空白乳化炸药分别增加了14.95%、21.74%和19.90%,且冲击波参数随着钛粉含量的增加先升高后降低,在10%时达到最大值;与空白乳化炸药相比,含钛乳化炸药(含钛量为10%时)的猛度提高了17.6%,说明钛粉对乳化炸药的爆轰性能作用效果显著。计算得到含钛乳化炸药的表观活化能为193.48 k J·mol^(-1),较之铝粉和硼粉,钛粉对乳化炸药的热安定性影响作用最小。展开更多
In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl nitrate.Metal powders’ e...In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl nitrate.Metal powders’ explosive properties and reaction mechanisms in FAE were studied by high-speed video,pressure test system, and infrared thermal imager. The results show that compared with pure liquid fuels, the shock wave overpressure, maximum surface fireball temperature and high temperature duration of the mixture were significantly increased after adding high energetic metal powder. The overpressure values of the liquid-solid mixture at all measuring points were higher than that of the pure liquid fuels. And the maximum temperature of the fireball was up to 1700C, which was higher than that of the pure liquid fuels. After replacing 30% of aluminum powder with boron or magnesium hydride, the shock wave pressure of the mixture was further increased. The high heat of combustion of boron and the hydrogen released by magnesium hydride could effectively increase the blast effect of the mixture. The improvement of the explosion performance of boron was better than magnesium hydride. It shows that adding high energetic metal powder to liquid fuels can effectively improve the explosion performance of FAE.展开更多
文摘利用水下爆炸和猛度实验测试了添加不同钛粉含量的乳化炸药的爆轰性能,并与含铝乳化炸药进行了对比;运用微量量热仪对不同乳化炸药样品进行热分析实验,通过计算得到它们的热分解动力学参数。结果表明:含钛量为5%的乳化炸药,比冲量、冲击波能、气泡能较空白乳化炸药分别增加了14.95%、21.74%和19.90%,且冲击波参数随着钛粉含量的增加先升高后降低,在10%时达到最大值;与空白乳化炸药相比,含钛乳化炸药(含钛量为10%时)的猛度提高了17.6%,说明钛粉对乳化炸药的爆轰性能作用效果显著。计算得到含钛乳化炸药的表观活化能为193.48 k J·mol^(-1),较之铝粉和硼粉,钛粉对乳化炸药的热安定性影响作用最小。
基金supported by the Young Scientists Fund of the National Natural Science Foundation of China (No. 11802136)。
文摘In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl nitrate.Metal powders’ explosive properties and reaction mechanisms in FAE were studied by high-speed video,pressure test system, and infrared thermal imager. The results show that compared with pure liquid fuels, the shock wave overpressure, maximum surface fireball temperature and high temperature duration of the mixture were significantly increased after adding high energetic metal powder. The overpressure values of the liquid-solid mixture at all measuring points were higher than that of the pure liquid fuels. And the maximum temperature of the fireball was up to 1700C, which was higher than that of the pure liquid fuels. After replacing 30% of aluminum powder with boron or magnesium hydride, the shock wave pressure of the mixture was further increased. The high heat of combustion of boron and the hydrogen released by magnesium hydride could effectively increase the blast effect of the mixture. The improvement of the explosion performance of boron was better than magnesium hydride. It shows that adding high energetic metal powder to liquid fuels can effectively improve the explosion performance of FAE.