Zobrazeno 1 - 10
of 18
pro vyhledávání: '"R. V. Grishaev"'
Publikováno v:
Physics of Wave Phenomena. 28:208-212
Lasing of an array of 30 single-mode laser diodes with different wavelengths is experimentally investigated in the scheme of spectral beam combining. The maximum lasing power of 7.2 W is obtained in the pulsed mode with the quality of the combined be
Autor:
M. D. Khomenko, D. N. Mamonov, R. V. Grishaev, Ya. V. Kravchenko, S I Derzhavin, V. P. Yakunin
Publikováno v:
Journal of Russian Laser Research. 41:434-440
We investigate the operating modes of diode lasers in the external cavity scheme of spectral beam combining, using the virtual laser-diode array method. We determine the spectral range of the diode array and the watt–ampere characteristics of a sin
Publikováno v:
Scientific Visualization. 11
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 80:381-386
The microstructure of a clad layer produced via selective laser cladding with coaxial metal powder injection is studied numerically. The Johnson–Mehl–Avrami–Kolmogorov equation for condensed systems with inhomogeneous rates of nucleation is use
Autor:
F. Kh. Mirzade, V. Ya. Panchenko, R. V. Grishaev, Sisa Pityana, Corney van Rooyen, V. G. Niziev, M. D. Khomenko
Publikováno v:
Physica B: Condensed Matter. 423:69-76
The numerical model of laser cladding with coaxial powder injection includes the equations for heat transfer, melting and crystallization kinetics. It has been shown that the main parameters influencing the melt pool dynamics and medium maximum tempe
Autor:
V. G. Niziev, R. V. Grishaev, M. D. Khomenko, Corney van Rooyen, Sisa Pityana, V. Ya. Panchenko, F. Kh. Mirzade
Publikováno v:
Modeling and Numerical Simulation of Material Science. :61-69
The study of laser-powder cladding process subject to heat transfer, melting and crystallization kinetics has been carried out numerically and experimentally. The Kolmogorov-Avrami equation was applied to describe the kinetics of the phase transition
Numerical investigation of unstable resonator for generating radially or azimuthally polarized beams
Publikováno v:
Optical Memory and Neural Networks. 19:248-253
We present the calculations of intracavity radiation for a confocal positive-branch unstable resonator with a radially or azimuthally selective mirror. We carried out beam propagation in the resonator by the fox-li iterative method using jones vector
Autor:
M G Galushkin, R V Grishaev
Publikováno v:
Laser Physics. 28:026001
Relying on the condition of dynamic matching of the process parameters in gas laser cutting, the dependence of the beam utilization factor on the cutting speed and the beam power has been determined. An energy balance equation has been derived for a
Autor:
Yu. N. Zavalov, R. V. Grishaev, V. Ya. Panchenko, V. D. Dubrov, Vladimir S. Golubev, M. G. Galushkin
Publikováno v:
Laser Physics. 16:40-51
The effect of pump nonequilibrium on the heat generation and the parameters of turbulent flow in the active medium of a fast-flow gas-discharge laser is studied. It is shown that the amplitudes of the turbulent pulsations of the density and refractiv
Publikováno v:
XIX International Symposium on High-Power Laser Systems and Applications 2012.
Unsteady heat transfer with simultaneous melting and crystallization at laser cladding process with coaxial metal powder injection is investigated numerically. Numerical modeling determined that the main parameters that govern melt pool dynamics and