基于超声阵列的云爆燃料浓度分布评估试验方法

云爆燃料爆炸抛撒具有高动态性、冲击波湍流和瞬态特性，其燃料浓度分布是燃料空气炸药(FAE）战斗部设计与引信起爆设计的基础。基于脉冲超声在燃料云雾中的衰减特性，建立FAE爆炸抛撒的多点阵列式动态燃料浓度分布评估试验系统。通过获得的燃料云雾中不同位置的超声衰减曲线，对燃料浓度在时间/空间的变化规律进行评估。研究结果表明：FAE静态爆炸抛撒下，中心区燃料云雾浓度由低至高、再由高减低；偏离中心区越远，浓度低的分布特点。该评估方法可以有效表征云爆燃料抛撒过程的浓度分布，为FAE引信系统的最佳起爆时间与位置提供了试验方法与数据支撑。

Test Method for Evaluating FAE Fuel Concentration Distribution Based on Ultrasonic Array

FAE fuel distribution exhibits high dynamics, shock wave turbulence, and transient characteristics during explosive ejection, and this fuel concentration distribution forms effect the design of FAE warheads and fuzes. This study proposes a multi-point array dynamic fuel concentration distribution evaluation test system for FAE blasting based on the attenuation characteristics of pulsed ultrasound in the fuel cloud. The time-space variation of fuel concentration is evaluated using the obtained ultrasonic attenuation curves at different positions in the fuel cloud. The results show that the fuel cloud concentration in the central area increases from low to high, and then decreases gradually. The concentration is lower away from the central area of fuel cloud. The evaluation method can characterize the fuel concentration distribution of the FAE throwing process effectively. It provides experimental methods and data support for determining the optimal detonation time and position of the FAE fuze system.