The study on the propagation behavior of flame and shock wave by image analysis

The propagation behaviors of the blast wave and the flame were investigated by optical measurement, when LOX and LNG falling freely onto the ground surface were exploded. The results of the image analysis showed that the propagation velocities of the flame and the blast wave were higher than the sound velocity. It was concluded that the explosion was the detonation, not the deflagration, although it was not happened all of this experiment. Furthermore, the arrival time and pressure value of the blast wave obtained by an image analysis were agreed with the measurement results by a piezoelectric pressure sensor.