多相燃料空气炸药爆炸压力场研究

采用高速运动分析系统对固态燃料FAE（Fuel Air Explosive）分散、爆轰过程进行光学测量,用压电传感器等组成的压力测试系统对FAE爆炸压力场进行测量,对固态燃料FAE燃料分散、爆轰波及冲击波进行了研究。分析了气-固-液多相爆轰的特征和压力波形的特点,研究了其冲击波峰值超压及比冲量随传播距离变化的规律。在云雾区内,多相爆轰波压力波形具有多峰结构,爆炸波峰值超压及冲量为一恒定值;爆轰区外,爆轰波转变成爆炸冲击波,峰值压力和比冲量迅速衰减,得到了峰值超压、比冲量随传播距离的变化规律。

Study on Blast Field Characteristics of Multiphase Fuel Air Explosive

Both solid state fuel air explosive cloud dispersion and formation process and detonation wave propagation of multiphase fuel air explosive were studied in this paper based on a high-speed motion analyzer. A pressure measurement system consisted of piezoelectric pressure sensors and data acquisition device was used to measure pressure field during explosion. The characteristics of pressure waveform of detonation and blast were studied. It is found that the pressure waveform of multiphase fuel air explosive is characterized by multi-peak structure. The variation of blast parameters with propagation distance was studied. Within the fuel air explosion cloud, the detonation wave parameters keep approximately constant. At the boundary and outside of the cloud, the detonation wave has transformed into blast wave, and the peak pressure and the specific impulse of the blast wave decreased rapidly. The relation between peak overpressure and specific impulse and propagation distance was obtained.