Open AccessИсследование ударных волн в электрохимическом микроактюаторе
Author(s) -
А.В. Постников
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.23.47017.17475
Subject(s) - implosion , shock wave , materials science , explosive material , bubble , microbubbles , mechanics , actuator , amplitude , shock (circulatory) , optics , acoustics , physics , chemistry , plasma , electrical engineering , medicine , organic chemistry , quantum mechanics , engineering , ultrasound
The explosive mode of operation of an electrochemical actuator is studied. In this mode of operation, we observe explosion of microbubbles containing the oxygen–hydrogen gas mixture that forms in the working chamber of the actuator during electrochemical water splitting by high-frequency pulses of alternating polarity. We demonstrate that shock wave emission occurs as a result of implosion of the void formed due to the microbubble explosion, rather than the explosion of the microbubble itself. Using the experimentally measured variation in the bubble wall velocity with the distance from the explosion center, we estimate the pressure amplitude at the shock front. The dynamic of microbubble collapse is established using time-resolved photography.