Modeling of Plasma-Chemical Reactions in Gas Mixture of CO2 lasers. II. Theoretical Model and its Verification

1995 ◽  
Vol 35 (3) ◽  
pp. 273-296 ◽  
Author(s):  
A. Cenian ◽  
A. Chernukho ◽  
V. Borodin
Keyword(s):  
Theoretical Model ◽  
Chemical Reactions ◽  
Gas Mixture ◽  
Co2 Lasers ◽  
Plasma Chemical

scholarly journals Influence of nitrogen on CO-laser characteristics

2017 ◽  
Vol 9 (2) ◽  
pp. 69
Author(s):  
Galina M. Grigorian ◽  
Adam Cenian
Keyword(s):  
Active Medium ◽  
Chemical Reactions ◽  
Nitrogen Addition ◽  
Plasma Phys ◽  
Gas Mixture ◽  
Co2 Lasers ◽  
Plasma Chemical ◽  
Co Laser ◽  
Laser Discharge ◽  
Laser Active Medium

The role of the addition of nitrogen to the discharge plasma of CO lasers on plasma-chemical processes is discussed here. It is shown that nitrogen addition improves laser characteristics and changes the composition of the laser active medium. A reduction of CO highly-excited vibrational-states populations with current is smaller in the case of mixtures with nitrogen additions. The addition of nitrogen significantly decreases CO dissociation level and concentrations of C atoms created in plasma-chemical reactions of laser discharge. Full Text: PDF ReferencesG.M. Grigorian and I.V. Kochetov, "Balance of CO molecules in the plasma of a sealed-off CO laser", Plasma Phys. Rep. 30, 788 (2004). CrossRef V.S. Aleinikov and V.I. Masychev, CO Lasers (Moscow, Radio i Svyaz' 1990).A. Cenian, A. Chernukho, V. Borodin and G.Śliwiński, "Modeling of Plasma-Chemical Reactions in Gas Mixture of CO2 Lasers I. Gas Decomposition in Pure CO2 Glow Discharge", Contr. Plasma Phys. 34, 25 (1994). CrossRef A. Cenian, A. Chernukho, V. Borodin, "Modeling of Plasma-Chemical Reactions in Gas Mixture of CO2 lasers. II. Theoretical Model and its Verification", Contrib. Plasma Phys. 35, 273 (1995). CrossRef A. Cenian, A. Chernukho, P. Kukiełło, R. Zaremba, V. Borodin and G. Śliwiński, "Improvement of self-regeneration of gas mixtures in a convection-cooled 1.2 kW laser", J.Phys. D: Appl.Phys. 30, 1103 (1997). CrossRef E.A. Trubacheev, Trudy FIAN 102, 3 (1977).G.M. Grigorian, B.M. Dymshits and Yu.Z. Ionikh, "Influence of oxygen on the parameters of the active medium in an electric-discharge CO laser", Sov J Quant Electron 19, 889 (1989). CrossRef V.N. Ochkin, S.Yu. Savinov, N.N. Sobolev and E.A. Trubacheev, Kvant. Elektr. 1, 573 (1974).

Theoretical Model of a Flow in a Tube With a Slit

2019 ◽  
Author(s):  
Yuki Toda ◽  
Masataka Morimatsu ◽  
Yu Nishio ◽  
Takanobu Ogawa
Keyword(s):  
Theoretical Model ◽  
Flow Field ◽  
Pressure Loss ◽  
Longitudinal Direction ◽  
Gas Mixture ◽  
Straight Tube ◽  
One Dimensional ◽  
Tube Type ◽  
Gas Burner

Abstract A tube-type gas burner consists of a straight tube with a slit along it and discharges an air-gas mixture through the slit to produce a flame. The flow velocity from the slit depends on the pressure in the tube and the pressure loss at the slit, and it varies in the longitudinal direction of the tube. The resulting uneven flame degrades the quality of the burner. In this study, we develop a one-dimensional theoretical model of the flow in a tube with a slit. To validate the result of the theoretical model, we also conduct experiments and numerical simulations for the same flow field. We applied this theoretical model to a flow in a tube, 1 m length, 40 mm in diameter, with a slit 2.5 mm wide. The end of the tube is closed. We also discuss the effect of the length of the burner on the unevenness.

Synthesis of Highly Transparent SiCxNyOz:H Films via Plasma-Chemical Decomposition of 1,1,3,3,5,5-Hexamethylcyclotrisilazane, Oxygen, and Nitrogen Gas Mixture

2019 ◽  
Vol 89 (11) ◽  
pp. 2290-2294
Author(s):  
A. G. Plekhanov ◽  
N. I. Fainer ◽  
E. A. Maksimovskiy ◽  
V. R. Shayapov ◽  
I. V. Yushina ◽  
...  
Keyword(s):  
Gas Mixture ◽  
Plasma Chemical ◽  
Nitrogen Gas ◽  
Chemical Decomposition
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