水下电晕放电若干基础物理问题研究

水下电晕放电是一种重要的低频水下声源，是一种新型的水下非螺旋桨推进动力，是一种新兴的先进氧化技术,在海洋远程探测与通讯、突破舰船航速限制以及修复水污染等方面具有重要的应用价值。水下电晕放电产生的流光丝是水下电晕放电等离子体声源、水下电晕放电等离子体推进以及水下电晕放电水污染处理的核心物理基础。本课题在前期建立的一系列单根流光丝诊断方法的基础上，系统研究水电导率对水下电晕放电流光丝物理性质的影响；提出了一种时空分辨图像识别处理方法深入研究冲击波与水下电晕放电流光丝物理性质的关系，探索控制水下声源频谱特性的方法；提出了一种单摆式非接触光学测量方法研究推进力特性，探寻控制和放大推进力的途径；系统研究电晕放电等离子体与电极材料相互作用，探讨满足水下电晕放电长时间持续稳定要求的电极材料，为水下声源、水下推进器以及水污染处理等关键设备的研制提供科学依据。

Underwater corona discharges have attracted extensive attention for its potential applications to underwater acoustic source, non-propeller underwater propulsion, and wastewater treatment. Streamer filaments created by the underwater corona discharge play a fundamental role in its applications to underwater acoustic source, underwater corona discharge plasma propulsion, and wastewater treatment by underwater corona discharge. In this proposal, the influence of water conductivities on the physical properties of the streamer filaments created by underwater corona discharge will be investigated using our previously established diagnostic methods for a single filament. A temporally and spatially resolved computer image reorganization method has been proposed for investigating the characteristic of the shock wave generated by the underwater corona discharges, aiming to exploring technical approaches to control the frequency of an underwater acoustic source. A non-contact optical simple pendulum method has been proposed for investigating the propulsion force produced by the underwater corona discharge, aiming to exploring technical approaches to increase and control the propulsion force. The interaction between the underwater corona discharge plasma and the electrode materials will be investigated, aiming to improve the feature of electrode materials for maintaining the underwater corona discharges. This proposal attempts to provide scientific basis for the development of facilities for the underwater acoustic source, non-propeller underwater propulsion and waste water treatment.