| The special physical and chemical properties of the unbalanced plasma in the relevant fields have applications and research,its characteristic continues to be studied and developed,especially in the combustion,the combustion efficiency has always been the focus of attention in power machinery such as engines.The main factor affecting the combustion process is not fully burned,mainly due to the imbalance of reaction energy in the reaction process,which in turn affects the chemical reaction process,thus ultimately affecting the ignition and final combustion processes of the fuel.In the plasma assisted combustion system,the low ignition delay time and the good combustion stability,the fuel combustion and ignition under extended low temperature are the key research processes and relevant research results are obtained.This is of great importance for improving the fuel combustion efficiency.For the dissociation and oxidation of fuel under the action of plasma,the active particles and groups activities frequently which have an important impact on the reaction process,which plays an important role in the later stage of ignition and combustion.Therefore,this study is mainly through experimental methods to analyze the stage.In this paper,we mainly analyze the dissociation and oxidation process of CH4 supported by dielectric barrier discharge in non-equilibrium plasma.Through NSD nanosecond pulse dielectric barrier discharge,AC dielectric barrier discharge,which for analysis and research the process of the different discharge modes of dielectric barrier discharge affect the characteristics of non-equilibrium plasma and the effect on fuel.The main research contents are as follows:(1)In the NSD nanosecond pulse discharge experimental study,the discharge characteristics,temperature and product concentration were studied in the experiment of NSD nanosecond pulse dielectric barrier discharge.In the experimental study which shows that the pulse energy in different the time dimension.And through the analysis of the energy path which with less energy dissipation,The pulse energy directly changes the reaction of the non-equilibrium plasma characteristics and the product concentration.(2)In the process of experimental study of AC dielectric barrier discharge,the input power,discharge frequency and discharge power were analyzed.The energy efficiency and energy path of AC discharge were also analyzed.Exceeding 50%of the energy is not effectively utilized for the non-equilibrium plasma-assisted CH4 dissociation and oxidation processes.(3)In the course of comparative analysis of two different types of discharges,the discharge characteristics,temperature and product concentration were mainly explored.By comparison,it was found that the NSD nanosecond pulse discharge mainly analysis from the small time scale process,and AC discharge mainly analysis from the big time scale process on the discharge process. |
