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Kinetics Characteristics and Bremsstrahlung of Argon DC Discharge Under Atmospheric Pressure

plasma Science and Technology 2013年第4期15卷 335-342页

作者：何为刘兴华咸日常陈素红廖瑞金杨帆肖汉光 State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Zibo Power Supply Company Shandong Electric Power Corporation Shandong Electric Power Research Institute Shandong Electric Power Corporation

An improved self-consistent, multi-component, and one-dimensional plasma model for simulating atmospheric pressure argon glow discharge is presented. In the model, both the plasma hydrodynamics model and chemical model are considered. The numerical simulation is carried out for parallel-plate geometry with a separation of 0.06 cm. The results show that Ar＊ plays a major role in the discharge, which is mainly produced by ground state excitation reaction. The electron temperature reaches its maximum in the cathode sheath but maintains a low value （0.23 eV） in bulk plasma. Elastic collision is the dominant volumetric electron energy loss in atmosphere argon glow discharge, which is negligible in low pressure argon glow discharge. The metastable step-wise ionization is the main mechanism for electron production to sustain the discharge. However, the highest contribution to electron production rate is ground state ionization reaction. The bremsstrahlung power density is related to electric voltage. With the increase of the electric voltage, the bremsstrahlung power density increases, namely, the strength of ultraviolet radiation spectrum enhances in the cathode sheath.

关键词： atmospheric pressure glow discharge plasma model metastable argon atom,ionization reaction bremsstrahlung power density

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On the calculation of the electron temperature flowfield in the DSMC studies of ionized re-entry flows

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Advances in Aerodynamics 2020年第1期2卷 107-119页

作者： Alexander Shevyrin Yevgeniy Bondar Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS 4/1Institutskaya Str.Novosibirsk 630090Russia

Currently available procedures of electron temperature calculations in studying ionized flows around reentry spacecraft by the direct simulation Monte Carlo(DSMC)method are *** is shown that the heat conduction of electrons is not taken into account in these *** contributions of various effects to the electron energy balance are calculated by an example of the RAM-C II capsule,and a numerical solution of the electron energy conservation equation is obtained,which refines the electron temperature distribution used in the DSMC computations.A method of coupled calculation of the electron temperature within the framework of the continuum approach and modelling of ionized gas flow by the DSMC method is proposed.

关键词： Energy transfer Ionized gases Low density flow DSMC method plasma model Electron temperature High-altitude aerothermodynamics Continuum flow Non-equilibrium flow

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