Numerical investigation of a fast-axial-flow CW CO2 laser

Jelvani, S.; Saeedi, H.

doi:10.1016/j.optlastec.2007.07.016

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…However, the kinetic modeling can be used to provide a theoretical basis for the design and optimization of multi parameter CW CO 2 lasers. In the previous published models, the results of calculations show that the optimum output power is obtained under different operating conditions where they predict the time-independent behavior of the output power (Nevdakh and Ganjali 2005;Li and Wang 2008;Wang 2010, 2011;Marion and Gary 1984;Burlamacchi et al 1988;Jelvani and Saeedi 2008;Galeev and Fedosov 2000;Sazhin et al 1993).…”

Section: Introductionmentioning

confidence: 94%

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Kinetic modeling of a slow flow CW CO2 laser

2011

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A kinetic model for analysis of the slow-flow CW-discharge CO 2 laser with diffusion cooling has been developed in which the gas temperature is obtained from energy balance equations. The method is based on the numerical solution of a set of nonlinear differential equations for vibrational kinetics. The numerical predictions from the model are compared with some experimental results and a good agreement is obtained.

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Section: Introductionmentioning

confidence: 94%

“…The small signal gain at central frequency is given by following expression (Jelvani and Saeedi 2008;Koushki et al 2011) …”

Section: Kinetic Modelmentioning

confidence: 99%

Kinetic modeling of a slow flow CW CO2 laser

2011

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“…To accomplish the numerical solution, the following assumptions are used in the model. 12,15 1. Stimulated emission occurs only for 10P (20) transitions in the (00 0 1, J) → (10 0 0, J + 1) band (10.6 μm).…”

Section: Governing Equations and Kinetic Modelmentioning

confidence: 99%

“…[7][8][9][10][11][12][13][14][15] The earliest research on computer modeling of a gas laser is Smith and Thompson. 7 Then Beverly proposed the six-temperature Boltzmann-equilibrium kinetics model.…”

Section: Introductionmentioning

confidence: 99%

“…14 And finally, Jelvani and Saeedi used numerical methods in the framework of a 1-D approximation of the set of governing equations and studied the effect of the laser tube diameter on the parameters of the active medium of the laser. 15 The development and application of the computational fluid dynamics (CFD) software make the analysis of the 3-D gas flow patterns possible and the discharge tube design process more efficient. 0091-3286/2010/$25.00 C 2010 SPIE In our previous research, we presented preliminary attempts on the numerical investigation of a FAF CO 2 laser using the CFD method, and the results appeared to be rather encouraging.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic modeling and optimum design of the discharge tube for the CO<sub>2</sub> laser with computational fluid dynamics method

Huang

Wang

2010

Opt. Eng

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The performance of a high-power fast-axial-flow CO 2 laser is directly determined by the characteristics of the turbulent flow of the active medium in the discharge region. To research the influence of the discharge tube structure on the internal gas flow field and determine the optimum design of the discharge tube, we use the computational fluid dynamics method and a set of governing equations to predict and compare the internal gas flow field of various sizes of discharge tubes. The influence of the tube diameter and gas inflow opening size on the gas flow velocity and turbulence intensity is discussed. There is good agreement between the theoretical prediction and the experimental results. The results obtained provide a basis for the optimum design of a high-power industrial fast-axial-flow CO 2 laser. C 2010 Society of Photo-Optical Instrumentation Engineers.

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Optimization of gas pressures ratio in a fast-axial-flow CO2 laser with genetic algorithm

Jelvani

Koushki

2012

Optik

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Numerical investigation of a fast-axial-flow CW CO2 laser

Cited by 10 publications

References 14 publications

Kinetic modeling of a slow flow CW CO2 laser

Kinetic modeling of a slow flow CW CO2 laser

Kinetic modeling and optimum design of the discharge tube for the CO<sub>2</sub> laser with computational fluid dynamics method

Optimization of gas pressures ratio in a fast-axial-flow CO2 laser with genetic algorithm

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