碩士生: 陳峙庭
畢業年分: 2017年６月
論文名稱: 微波誘發電漿對於火焰電漿之影響 (中文) / The Effect of Microwave-induced Plasma on a Flame Plasma
中文摘要:
本論文研究主題在於觀測利用浮動電極於一大氣壓下之微波共振腔中所誘發的放電電漿，對於常壓火焰電漿的物化性質之影響。在本實驗系統中，在微波產生器其輸出功率增加至200瓦後，誘發金屬針尖的尖端放電現象。微波誘導電漿對於火焰電漿的影響則利用朗謬爾探測針來進行探討﹔藉由此量測技術，實驗數據結果顯示電極針尖附近的電子溫度在微波電磁場施加過程中受到加熱至原本的350%，至於電極針尖附近的電漿密度則上升超過400%。除了受到微波誘發電場的影響，在放電過後的電極尖端附近可量測到一直流電場的存在，而此直流電場可造成些微的電漿濃度分布扭曲。從朗謬爾探針沿著燃燒器軸方向上的量測結果可以發現，該微波電場加速電子動能效應受到空間上的侷限。配合放射光譜儀的實驗結果，合理地提出微波能量的導入對於強化火焰速度與火焰穩住的應用之影響進行探討途徑。
英文摘要:
A microwave resonator integrated with a floated electrode was used to initiate an additional plasma source, and in the meantime examine the impact on a flame plasma at atmospheric pressure. In the current system, the corona discharge occurred at 200 W of microwave power introduction. The effect of a microwave-induced corona discharge plasma on a flame plasma is investigated by using a double Langmuir probe, through which the electron temperature around the electrode tip was found to have a significant increment by over 350 % of its original value, and the plasma concentration was increased by over 400 %. Apart from the effects of microwave field, a DC field was also observed after the plasma discharge, which led to slightly and spatially bending of the distribution of the ion concentration. The limited effective region of electron acceleration induced by the microwave field was realized from the Langmuir probe measurements along the axis of the combustor. Together with the optical emission spectrometric results measured from the gas where the discharge occurred, the mechanism of the enhanced flame speed as well as its application on flame stabilization can be rationalized.
