Advanced Functionalization of Plasma Bubble Flow Systems by Microdischarge and Its Innovative Applications

在原有的和改进的脉冲放电多气泡射流系统中成功地产生了OH和O自由基。并通过实验阐明了水处理过程中有害持久性物质的降解等特性。研究了气泡射流在放电作用下的动力学行为、气泡界面流注的传播以及处理后溶液中自由基的产生。研究了电压、占空比、频率、气体流量和系统结构对亚甲基蓝和乙酸的降解率和能量效率的影响。通过可视化分析，建立了直流放电条件下细管内气泡的动力学行为模型。最后，建立了等离子体化学模型，阐明了在高温高压条件下气泡内自由基的产生过程和自由基的寿命。

OH and O radicals are successfully generated in the original and improved multiple bubble jet systems with pulsed discharge. Then water treatment characteristics such as decomposion of harmful persistent substances in solution were clarified experimentally. The dynamic behavior of bubble jet with discharge, streamer propagation at the bubble interface and radicals generation in the treated solution were investigated. The docomposition rate and energy efficiency of methylene blue and acetic acid were clarified for the applied voltage, duty ratio, frequency, gas flow rate and systems configuration for the optimized water treatment processes. Furthermore, the dynamic behavior model of bubble in a fine tube under DC discharge was proposed by visulalization analysis. Finally, plasma chemistry model was also established to clarify the radical generation process and radical life time in a bubble with high pressure and high temperature conditions.