基于深度学习的火花放电等离子体反应器电压波形优化设计  

A Voltage Waveform Optimum Design for Spark Plasma Reactor Based on Deep Learning

作　　者：尹博 朱益飞 YIN Bo;ZHU Yifei(School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;National Key Lab of Aerospace Power System and Plasma Technology,Air Force Engineering University,Xi’an 710038,China)

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]空军工程大学航空动力系统与等离子体技术全国重点实验室,西安710038

出　　处：《空军工程大学学报》2023年第2期51-59,共9页Journal of Air Force Engineering University

基　　金：国家自然科学基金青年科学基金(51901204)。

摘　　要：等离子体点火助燃在近些年来受到了国际众多学者的广泛关注,传统的火花放电等离子体反应器基于重复性实验设计,但随着飞行高度升高,气压降低和燃烧室流速增大,单纯的热效应无法适应逐渐恶劣的燃烧室环境,限制了燃烧室的安全工作边界。为了维持火花放电,更合理更高效地控制等离子体放电反应,产生所需的活性物质和能量,为此对电源电压进行优化设计。利用二维模型、零维模型以及深度学习模型计算分析了放电频率和电子密度增长方式对火花放电的影响,通过神经网络模型计算得到电压幅值的增长率与初始电子密度的增长率成负线性关系,电子密度增长方式中先慢后快和分段增长更省能,而电子密度分段式增长所对应的电压放电所产生的O原子和O(1D)粒子数更多,更有利于助燃。综合考虑能耗和助燃组分粒子数,分段式增长的电子密度所对应的电压波形是火花放电点火助燃最佳的选择。In recent years,numerous international scholars are paying a good deal attention to what is going on in plasma ignition and assisted combustion area.The traditional spark discharge reactor is designed based on repetitive experiment.But the heating effect is unable to cope with bad environment gradually,and the bad environment restricts the safe working boundary of the combustion chamber along with the increase of height,the decrease of pressure,and the increase of flow velocity in the combustion chamber.In order to maintain the spark discharge,the optimization of power supply is needed.The plasma discharge reaction is under more rationally and efficiently control to generate the required active particles and energy.The effect of discharge frequency and electron density growth method on spark discharge is analyzed by using two-dimensional model,zero-dimensional model and deep learning model.The results show that the growth rate of voltage amplitude becomes a negative linearity related to the growth rate of initial electron density by building neural network model.The slow-fast and segmented growth in electron density is more energy-saving in air discharge system,and the number of O atoms and O(1D)particles produced by the segmented growth of electron density is higher and more favorable for ignition.In consideration of the energy consumption and the particles of assisted combustion,the voltage waveform corresponding to the segmented growth of electron density is the best one in choices for spark discharge.

关 键 词：等离子体点火助燃 火花放电 电压波形优化 数值模拟 深度学习 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]