Remote Optical Diagnostics of Nonstationary Aerosol Media in a Wide Range of Particle Sizes

Kudryashova, O. B.; Павленко, А. А.; Vorozhtsov, B.I.; Titov, S. S.; Архипов, В. И.; Бондарчук, С. С.; Maksimenko, Eugeny; Akhmadeev, I. R.; Muravlev, Eugeny

doi:10.5772/35215

Cited by 18 publications

(13 citation statements)

References 1 publication

(1 reference statement)

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“…Technical characteristics of the ultrasonic device: diameter of radiator-320 mm, level of sound pressure-not less than 140 dBA, frequency of oscillations-28 kHz. Disperse characteristics and concentration of an aerosol measured by means of the optical methods as described in (Kudryashova et al, 2012) (device LID-2M). The diagram of the experimental installation is shown in Fig.…”

Section: Experimental Studymentioning

confidence: 99%

Sedimentation of harmful dust by means of ultrasonic waves and additional disperse phase

et al. 2015

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The harmful effect on the health of superfine dust in industry is a serious problem. An especially important and complex task is the development of new methods for sedimentation of dust particles with a characteristic size of less than 10 μm. The solution offered by the authors involves a combined method of impact on industrial dust using highfrequency acoustic fields and spraying of a superfine water aerosol. Acoustic radiation sources are successfully applied to cleaning rooms from dust having fairly large particle sizes (10 μm and larger). The sedimentation of fine aerosols (particle diameter of 1-10 μm) is a more complicated challenge. The paper is devoted to substantiation of the acoustic sedimentation method for such aerosols. Good results were achieved when additional disperse phase was applied together with the ultrasonic source. Calculation results according to the mathematical model for coagulation and sedimentation, based on Smoluchowski's equation, taking into account evaporation of liquid droplets, are given. Results of the experimental and theoretical study of the processes of acoustic sedimentation of superfine aerosols are presented. Recommendations are offered for the use of sources of ultrasonic radiation and sprayers of water aerosol for optimum removal of dust from workplace air.

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Section: Experimental Studymentioning

confidence: 99%

Sedimentation of harmful dust by means of ultrasonic waves and additional disperse phase

et al. 2015

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“…In the experiments, a proprietary remote method for measuring the particle concentration and the particle size distribution function was used. This method is based on the modified small-angle scattering method of probe radiation [11]. The method can measure the aerosol particle concentration and size distribution with a high time resolution.…”

Section: Experimental Partmentioning

confidence: 99%

“…The cavitation bubble carrying the water layer: (a) before expansion and (b) at the break-down moment.The water layer thickness at the break-down moment is h=(D wmax -D max )/2. Taking into consideration Eq (11). and the condition for mass equality of the liquid carried by the bubble both inside the atomizer and after flowing out of the nozzle,…”

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confidence: 99%

The role of cavitation in submicron aerosol dispersion

et al. 2018

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Here we discuss the problem of atomizing submicron aerosols by special design atomizers enabling the cavitation regime. The formation of submicron aerosol was studied using an impulse atomizer model powered by a high-energy material and an atomizer model with a special spray nozzle generating countercurrent flows. For these atomizers, the role played by cavitation in producing submicron liquid aerosols is demonstrated herein. A mathematical model is also suggested to describe the aerosol cloud genesis. The cavitation development critical pressure, outflow velocity, and the resulting droplet sizes were evaluated. The aerosol particle size and concentration were experimentally measured by optical methods. The measured disperse parameters of aerosols during the origination and propagation of the aerosol cloud resulted from the cavitation-assisted atomization of liquids are reported: the intrinsic particle diameter of water aerosol is 10…30 μm depending on the features of the atomizer designs and their operating regimes.

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“…Technical characteristics of the ultrasonic device: diameter of a radiator-320 mm, level of sound pressure-not less than 140 dBA, the frequency of fluctuations-28 kHz. Disperse characteristics and concentration of an aerosol measured by means of the optical methods described in [10] (devise LID-2M). The scheme of experimental installation is shown in Figure 1.…”

Section: Model Calculations and Comparison With The Experimentsmentioning

confidence: 99%

Sedimentation of Superfine Aerosol by Means of Ultrasound

Antonnikova¹,

Korovina²,

Kudryashova³

2013

OJA

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The article is devoted to a problem of sedimentation of superfine aerosols with a characteristic size of particles, an order of values of micrometers. Acceleration of the sedimentation process is promoted by imposing of an acoustic field that leads to acceleration of coagulation of particles. Besides, pressure of the sound radiation directed down, accelerates gravitational sedimentation of an aerosol. The mathematical model is based on the Smolukhovsky's equation, describeing dynamics of change of distribution function by the sizes of aerosols particles taking into account ultrasonic influence, evaporation (for liquid aerosols) and sedimentation. Influence of introduction of an additional phase on coagulation and sedimentation speed is investigated. Results of a theoretical and experimental study of dispersion parameters and the sedimentation speed of superfine aerosols are presented.

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Remote Optical Diagnostics of Nonstationary Aerosol Media in a Wide Range of Particle Sizes

Cited by 18 publications

References 1 publication

Sedimentation of harmful dust by means of ultrasonic waves and additional disperse phase

Sedimentation of harmful dust by means of ultrasonic waves and additional disperse phase

The role of cavitation in submicron aerosol dispersion

Sedimentation of Superfine Aerosol by Means of Ultrasound

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