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- 저자 : Belasri (검색결과 2 건)
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Numerical investigation of gas heating effect in dielectric barrier discharge for Ne-Xe excilamp
Amar Benmoussa,Ahmed Belasri,Zahir Harrache 한국물리학회 2017 Current Applied Physics Vol.17 No.4
The purpose of this paper is to study the gas heating phenomenon in dielectric barrier discharge (DBD) due to the Joule heating effect for Ne-Xe gas mixtures. In this work, the simulationwas performed using a one-dimensional fluid model. The gas temperature profile was calculated by heat conduction equation resolution along gap distance of discharge. The increasing of gas temperature close to the vicinity of cathode is due to the high values in the power deposited in this region. The results show that the gas temperature in DBD excited with rectangular applied voltage waveform is more important than the discharge created by a sinusoidal excitation. For high values of secondary electron emission coefficient (g) the gas temperature will be increasing. The effect of varying gas mixture composition on gas temperature has been also examined.
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Theoretical investigation of ozone production in negative corona discharge
B. Mennad,Z. Harrache,D. Amir Aid,A. Belasri 한국물리학회 2010 Current Applied Physics Vol.10 No.6
The purpose of this work is to highlight the chemical kinetics in plasma of pure oxygen. A comprehensive model of ozone generation in wire-to-cylinder negative corona discharge is presented. The model combines the physical processes in the discharge with the chemistry of ozone formation. It is based on an extensive reaction scheme including the major electronic and ionic processes. The importance of excited atomic and molecular states is demonstrated. The obtained results show clearly that the surface material affect quite well the ozone decomposition.
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