Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Olga I. Dokukina"'
Publikováno v:
Moscow University Physics Bulletin. 74:256-261
Turbulent fluctuations of density and pressure in air and argon in a shock tube have been investigated, as well as their interaction with a shock wave reflected from a perforated plate at the end of the shock tube. The Mach number of the incident sho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68a7ba222d3c49429ebeadcd659baa72
https://doi.org/10.3103/s0027134919030056
https://doi.org/10.3103/s0027134919030056
Publikováno v:
Doklady Physics. 62:551-554
Turbulent fluctuations of density and pressure in air and argon in a shock tube have been investigated as well as their interaction with a shock wave reflected from a perforated plate at the end of a shock tube. Air and argon were used as test gases.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ae8fa48b34ec6eaf050cc1b972d6c29
https://doi.org/10.1134/s1028335817120059
https://doi.org/10.1134/s1028335817120059
Autor:
L.S. Shtemenko, Fedor V. Shugaev, Oxana A. Nikolaeva, N. A. Suhareva, Dmitri Y. Cherkasov, Olga I. Dokukina
Publikováno v:
Optics in Atmospheric Propagation and Adaptive Systems XX.
The investigation was fulfilled on the basis of the Navier-Stokes equations for viscous heat-conducting gas. The Helmholtz decomposition of the velocity field into a potential part and a solenoidal one was used. We considered initial vorticity to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a0e9fb16d23ef4a0c278f1dc0cf7c7a
https://doi.org/10.1117/12.2278085
https://doi.org/10.1117/12.2278085
Publikováno v:
Moscow University Physics Bulletin. 68:118-122
The interaction of a shock wave with a turbulent air flow is investigated experimentally. The turbulence was created with the aid of a grid. On its reflection from a perforated disc the wave propagated through a turbulent flow. The Mach number of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98c739d5ad049ca11f37b548e2c09d69
https://doi.org/10.3103/s0027134913020033
https://doi.org/10.3103/s0027134913020033
Autor:
L.S. Shtemenko, Oxana A. Nikolaeva, Fedor V. Shugaev, Tatiana Petrova, Oxana A. Solenaya, Olga I. Dokukina
Publikováno v:
SPIE Proceedings.
The improvement of the parametrix method for solving the full system of the Navier-Stokes is presented. As known the fundamental solution equation is an oscillatory one. These oscillations are observed while analyzing the density evolution. Their fre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::563e5a3f840403930068c0fbce808a6c
https://doi.org/10.1117/12.898108
https://doi.org/10.1117/12.898108
Publikováno v:
SPIE Proceedings.
Related problems are as follows: (i) evolution of the vortical structures which play an important role in turbulence; (ii) laser beam propagation through turbulence; (iii) object-targeting problem. The parametrix method was used. The convergence of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0a9b3ec7597319a5ef43267da0acf22
https://doi.org/10.1117/12.864990
https://doi.org/10.1117/12.864990
Publikováno v:
SPIE Proceedings.
The method is proposed in order to model the propagation of a laser beam through turbulence. Two kinds of beams are under consideration: (i) beams of small power; (ii) high-power beams with effect of self-focusing (including ultra-short laser pulses)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b73677ac4fb3702d2ac2ebeeebae954
https://doi.org/10.1117/12.830161
https://doi.org/10.1117/12.830161
Publikováno v:
SPIE Proceedings.
The influence of the strong turbulence regime on the laser beam propagation and focusing has been investigated. Turbulence was modeled on the base of the full Navier-Stokes equations which were transformed into the system of the Volterra type. The in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::541dae1b06e54dedbad4b5f22918af80
https://doi.org/10.1117/12.800171
https://doi.org/10.1117/12.800171
Publikováno v:
SPIE Proceedings.
We modelled a whirlwind in the atmosphere with the aid of system of the linear [1] and weakly nonlinear 3D system of the Navier-Stokes equations. We investigated Gaussian beam propagation through the modelled whirlwind in the atmosphere. Parabolic eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b518d0dab496a5f4c3e8a70da4d1d2ab
https://doi.org/10.1117/12.665751
https://doi.org/10.1117/12.665751
Publikováno v:
SPIE Proceedings.
We investigated Gaussian beam propagation through the turbulent atmosphere. The solutions of the linear and nonlinear unsteady 3D Navier -- Stokes equations have been used for modeling of turbulent fluctuations. Parabolic equation method has been app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::488b165c69e654f0df578330a81b7803
https://doi.org/10.1117/12.627516
https://doi.org/10.1117/12.627516