A multi-electrode array is commonly applied in a plasma sparker to generate stable acoustic pulses.In this paper, the effects of the electrode configuration on the performance of a plasma sparker have been investigate...A multi-electrode array is commonly applied in a plasma sparker to generate stable acoustic pulses.In this paper, the effects of the electrode configuration on the performance of a plasma sparker have been investigated. In terms of the load electrical characteristics, the electrode radius and distance have negligible influence on the electric characteristics, whereas a larger electrode number results in a smaller voltage and a larger current but has little effect on the load energy. Regarding the acoustic characteristics, both the expansion and collapse pulses can be increased by decreasing the electrode tip radius. the influence of the electrode number and electrode gap distance on the amplitude of the expansion pulse was found to be negligible. And the amplitude of the collapse pulse decreases significantly with increasing electrode number. Increasing the electrode number decreases the energy efficiency for intense bubble interactions, thus, a small electrode tip radius and a small electrode number are preferred for the design of a plasma sparker if the total discharge energy is given.展开更多
基金supported by the National Key R&D Program of China under Grant 2016YFC0303901NSFC with grant numbers:U1606401,41476080,21276232 and 51377145+3 种基金Public Science and Technology Research Funds Projects of Ocean with grant number:201405036-2NSF of Zhejiang Province with grant number:LQ14D060004,LY13E070002 and 2014C33022Program for Zhejiang Leading Team of S&T Innovation with grant number:2013TD07Research Fund for the Taishan Scholar Project of Shandong Province with grant number:TSPD20161007
文摘A multi-electrode array is commonly applied in a plasma sparker to generate stable acoustic pulses.In this paper, the effects of the electrode configuration on the performance of a plasma sparker have been investigated. In terms of the load electrical characteristics, the electrode radius and distance have negligible influence on the electric characteristics, whereas a larger electrode number results in a smaller voltage and a larger current but has little effect on the load energy. Regarding the acoustic characteristics, both the expansion and collapse pulses can be increased by decreasing the electrode tip radius. the influence of the electrode number and electrode gap distance on the amplitude of the expansion pulse was found to be negligible. And the amplitude of the collapse pulse decreases significantly with increasing electrode number. Increasing the electrode number decreases the energy efficiency for intense bubble interactions, thus, a small electrode tip radius and a small electrode number are preferred for the design of a plasma sparker if the total discharge energy is given.
