Critical tube diameter for detonation transmission and critical initiation energy of spherical detonation

Propagation characteristics of shock waves driven by gaseous detonation waves

“…Firstly, we confirmed data consistency with Sochet et al [24]. Secondly, we addressed the peak overpressure decay with better spatial resolution using visualization and much broader distance…”

“…from the tube open end than Sochet et al [24] and shape transition of the shock wave. The results obtained in the present study were normalized using non-dimensional distance R d and non-dimensional …”

“…We normalized our results using two non-dimensional parameters [24], as shown in Figure 18 As mentioned above, we also compared our results with the results [21,22] using the open-ended shock tube with the non-dimensional parameters proposed by Schmidt et al [21] in Figure 19. Their results are approximately three times as great as our results under normalized pressure.…”

“…We used p CJ , u CJ , a CJ as the conditions at the open end of the tube. This relation was originally proposed by Sochet et al [24] and is based on the Piston Model presented in their study. As shown in Figure 4, the contact surface between the ambient gas (air) and burned-pressurized gas produced by a detonation wave compresses the ambient gas and continuously performs work on the ambient gas, creating a shock wave.…”

“…In the far field from the open end of the tube, we obtained overpressure histories of shock waves using piezo-pressure sensors, because we believe that the longer distance a shock wave propagates, the more viscous effect should be observed in its peak overpressures. The results obtained were organized using non-dimensional distance and pressure as proposed by Sochet et al [24].…”