At present, underwater electric pulsed discharges are used in a wide range of modern applications. During the development of a system for generating underwater acoustic pressure pulses, a numerical model is an essential tool for guiding the design and interpreting the data. Developing a complex one-dimensional numerical code, like those presented in the literature, requires a substantial dedicated effort. Unfortunately, previous work trying to use simple and elegant theoretical models developed many decades ago reported a fundamental issue, apparently related to the input data. The present work performs a detailed analysis of the real meaning of the voltage measured across an underwater discharge and clarifies the correct way the power input to a simple two-phase model should be calculated. Based on accurate measurements, a phenomenological methodology to obtain the input data is demonstrated, with theoretical predictions obtained from the simple two-phase model being successfully compared with the experimental evidence obtained from both the present work as well as from other reliable data presented in the literature.
Study of the efficiency of energy transfer from chemical to acoustic pressure Study of the efficiency of energy transfer from chemical to acoustic pressure impulse for an underwater aluminum exploding wire impulse for an underwater aluminum exploding wire PLEASE CITE THE PUBLISHED VERSION
The present work is dedicated to the determination of the Gurney velocity of the unconventional aluminum‐water explosive. The paper presents the experimental arrangement, the diagnostic equipment used, and the main results that have been obtained. The experiments report the accurate velocity measurement of projectiles accelerated by aluminum and copper underwater exploding wires. Based on the results obtained, a Gurney velocity of 1.88 km/s has been obtained for the unconventional aluminum‐water explosive. The result is discussed and compared with typical values for standard explosives.
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