燃料空气炸药二次起爆引信与爆轰云雾动态交会浓度检测方法

燃料空气炸药（FAE）抛撒后形成最大能量云雾爆轰的关键，在于二次起爆引信能否在极短的交会时间内完成快速准确的最优云雾爆轰浓度检测。通过试验和仿真工具验证了利用脉冲超声在云雾介质中的回波衰减对云雾浓度快速检测方法的可行性。为保证试验结果的准确和严谨性，高动态交会环境下引信样机检测的流道内云雾浓度无法与预设环境浓度视为等同。采用计算机数值模拟方法，模拟出100 m/s试验工况下引信与云雾交会过程中检测流道内的气体与固体两相流体浓度分布。结果表明，在浓度分别为75 g/m³、150 g/m³、225 g/m³的交会环境中，引信流道的仿真浓度与脉冲超声在流道内的传播衰减率具有一致性，可为提高FAE武器最优起爆提供分析手段。

Dynamic Rendezvous Concentration Detection Method for FAE Secondary Detonation Fuze and Blast Cloud

The key to the formation of maximum fuel-air cloud detonation after the dispersion of fuel-air explosive (FAE) is whether the secondary detonation fuze can detect the optimal cloud detonation concentration quickly and accurately in a very short rendezvous time.The feasibility of the method of rapidly detecting the cloud concentration by using the echo attenuation of pulsed ultrasound in cloud is verified by test and simulation tools. For the accuracy and rigor of the test results，the cloud concentration in the fuze channel detected by the fuze prototype in the high dynamic rendezvous environment can not be regarded as the same as the preset environmental concentration. The computer numerical simulation method is used to simulate the gas-solid two-phase fluid concentration distribution in the fuze and cloud rendezvous process under 100 m/s test conditions. The experimental results show that the simulated concentration of fuze channel is consistent with the attenuation rate of pulsed ultrasonic propagation in the channel in the rendezvous environment with concentration of 75 g/m³，150 g/m³ and 225 g/m³，which provides an analysis means to improve the optimal initiation of FAE weapons.