研究目的
To study the discharge mechanism and discharge parameters evolution of micro-cavity dielectric barrier discharge (MDBD).
研究成果
The experimental platform and the equivalent circuit was established on the basis of the physical process of MDBD discharge and the experimental results. The simulation results show that the air gap voltage remains about 3.5 kV after the air gap breakdown; the periodical change of electron density is consist with that of the discharge current, and at the peak of discharge current, the electron density reached its maximum value of 1.6 ×1016 m-3. The electron temperature reached its peak 3.0 eV when the electron density reached its peak with the discharge process. The variation of the electron temperature is consistent with that of current. The reduced electric field is about 40 Td after the discharge gap breakdown, so the electron temperature of MDBD is lower than the conventional DBD.
研究不足
The simulation model is established under ideal condition, which cannot fully reflect the effect of single filament discharge. The rapidity and complexity of the discharge process in micro-cavity and the limitation of the measurement method make it difficult to get an accurate and comprehensive variation of the discharge parameters only through the experimental methods.
1：Experimental Design and Method Selection:
An experimental platform based on the dielectric panel surface grid micro-structure electrode device was built. Discharge equivalent circuit of the MDBD was established based on the deep analysis of the discharge physical process and experimental results.
2：Sample Selection and Data Sources:
The experiment was carried out in atmospheric pressure. The type of the plasma power supply for the experiment is CoronalabCTP-2000K.
3：0K. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The types of oscilloscope and the high-voltage probe are UTD2052CL and Tektronix P6015A respectively. The measurement capacitor and resistor are connected in series in the discharge circuit to obtain the discharge charge and discharge current.
4：Experimental Procedures and Operational Workflow:
The voltage signal was attenuated 1000 times by the high-voltage probe and then input into the CH1 of the oscilloscope. The voltage signal on the measurement capacitor is input into the CH2 of the oscilloscope.
5：Data Analysis Methods:
Using Matlab/Simulink and BOLSIG+ software, we solved the Kirchhoff’s voltage equation, Boltzmann equation and the electronic continuity equation to obtain the variation of the discharge characteristic parameters.
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