Strong shock waves can be generated by pulse discharge in water, and the characteristics due to the shock wave normal reflection\nfrom rigid walls have important significance to many fields, such as industrial production and defense construction. This paper\ninvestigates the effects of hydrostatic pressures and perturbation of wave source (i.e., charging voltage) on normal reflection of onedimensional\nunsteady flow shock waves. Basic properties of the incidence and reflection waves were analyzed theoretically and\nexperimentally to identify the reflection mechanisms and hence the influencing factors and characteristics. The results indicated\nthat increased perturbation (i.e., charging voltage) leads to increased peak pressure and velocity of the reflected shock wave,whereas\nincreased hydrostatic pressure obviously inhibited superposition of the reflection waves close to the rigid wall. The perturbation\nof wave source influence on the reflected wave was much lower than that on the incident wave, while the hydrostatic pressure\nobviously affected both incident and reflection waves. The reflection wave from the rigid wall in water exhibited the characteristics\nof a weak shock wave, and with increased hydrostatic pressure, these weak shock wave characteristics became more obvious.
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