Laser Monitoring of a Turbid Atmosphere Using Nonlinear Effects

Zuev, V. E.; Zemlyanov, A. A.; Kopytin, Yu. D.; Kuzikovskii, A. V.

doi:10.1007/978-94-009-5219-5_8

Cited by 4 publications

(11 citation statements)

References 2 publications

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“…One way to decrease optical beam attenuation in atmospheric aerosols is use of high‐power lasers . However, this method has significant drawbacks …”

Section: Methods Descriptionmentioning

confidence: 99%

Forming a transparent atmospheric optical channel by use of vortical laser beam

Artyschenko

Pasternak

Proskurin

et al. 2017

Micro & Optical Tech Letters

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It was shown that promising way to reduce a power loss of optical waves transmitted through atmosphere is use of spatially inhomogeneous optical waves with phase front in form of flat spiral. Vortical optical beam used to separate aerosol (due to light pressure on water particles) and create a cone wherein droplets concentration is substantially reduced. Unlike known method to create a transparent atmospheric optical channel based on use evaporation of aerosol particles via high‐power laser radiation, proposed method is substantially less energy‐consuming since when moving aqueous aerosol particle from area of laser beam propagation no evaporation occurs.

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“…One way to decrease optical beam attenuation in atmospheric aerosols is use of high‐power lasers . However, this method has significant drawbacks …”

Section: Methods Descriptionmentioning

confidence: 99%

Forming a transparent atmospheric optical channel by use of vortical laser beam

Artyschenko

Pasternak

Proskurin

et al. 2017

Micro & Optical Tech Letters

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“…The second equation describes intensity of phase transformations on a droplet surface [8]. The direction of vapour flow is unambiguously defined by a logarithmic function, called the Stefan's algorithm.…”

Section: Problem Formulationmentioning

confidence: 99%

“…The influence of the Knudsen layer on heat and mass transfer processes can serve as a factor for determination of a droplet size [18]. As the value of the Knudsen number is sufficiently small, vapour flow density from evaporating droplets depends on the Stefan's hydrodynamic flow and the rate of diffusion processes, which occur under the influence of liquid vapour's gradient [8]. As the value of the Knudsen number increases, the influence of kinetic processes near droplet surface increases as well.…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to state, that the study [7] generalizes the achievements of modern research of the ''droplet" problem, as radiant influence is neglected. The study [8] presents the method, which allows transforming nonlinear parabolic-type second degree energy equation, which describes the thermal state of a spherically symmetrical droplet, consisting of semitransparent liquid, evaporating and warming in a flow of monochromatic radiation, into the problem of unsteady heat transfer with known source function and presentation of this problem using an infinite sum of integral equations. Coherence of the external and internal ''droplet" problems is shown; the necessity to formulate the boundary conditions in regards to unknown temperature of a droplet surface is presented; the conditions of the mode of a droplet's explosive evaporation are discussed.…”

Section: Introductionmentioning

confidence: 99%

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The peculiarities of hot liquid droplets heating and evaporation

Miliauskas¹,

Garmus²

2009

International Journal of Heat and Mass Transfer

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“…Using the intensity boundary condition we find from (3): J(r,zt) = 10(r,t)exp[-t(r,z,t)] , or -r(r,z,t) = ln[10(r,t)/ I(r,z,t)] (5) where t(r,z, t) = NJ q(r,z' ,t)dz' (6) is the optical depth of the aerosol. These relations are applicable throughout the space and any time.…”

Section: Laser Beam Clearing Of An Aerosol Longitudinal Flowmentioning

confidence: 99%

Clearing aerosol in the condensation trail behind aircraft

Kucherov

1999

SPIE Proceedings

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Clearing of water aerosol by laser beam vaporization of particles is investigated in the condensation trail behind aircraft. Physical parameters are calculated for the condensation trail behind subsonic and supersonic, Russian and American aircraft in cruise. Solutions are derived for the intensity of laser radiation, moisture (ice content) and optical thickness of the aerosol in the flow, which is parallel to the beam path. These physical values are described as a function of time and coordinate at the distances of significant medium clearing and radiation extinction.atmosphere.considered the heat sources inside particles created by absorbing laser radiation and derived universal expressions for mass and energy flows from the surface of particles having different efficient radii [101.

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Laser Monitoring of a Turbid Atmosphere Using Nonlinear Effects

Cited by 4 publications

References 2 publications

Forming a transparent atmospheric optical channel by use of vortical laser beam

Forming a transparent atmospheric optical channel by use of vortical laser beam

The peculiarities of hot liquid droplets heating and evaporation

Clearing aerosol in the condensation trail behind aircraft

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