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 1700 °C, 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.

为了提高带有延迟二次点火器的燃料空气炸药（FAE）的能级，将高能金属粉末添加到主要由醚和硝酸异丙酯组成的液体燃料中。通过高速视频，压力测试系统和红外热像仪研究了FAE中金属粉末的爆炸特性和反应机理。结果表明，与纯液体燃料相比，添加高能金属粉末后，混合物的冲击波超压，最高表面火球温度和高温持续时间显着增加。液固混合物在所有测量点的超压值均高于纯液体燃料的超压值。火球的最高温度高达1700°C，高于纯液体燃料的最高温度。用硼或氢化镁代替30％的铝粉后，混合物的冲击波压力进一步增加。硼的高燃烧热和氢化镁释放的氢可有效提高混合物的爆炸效果。硼爆炸性能的改善优于氢化镁。结果表明，在液体燃料中添加高能金属粉可以有效提高FAE的爆炸性能。