Biliaiev N.N., Rusakova T.I. Reducing of gas concentration in the air environment

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Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 139

Geoteh. meh. 2018,139, 135-144

DOI: https://doi.org/10.15407/geotm2018.02.135

REDUCING OF GAS CONCENTRATION IN THE AIR ENVIRONMENT

¹Biliaiev N.N., ²Rusakova T.I.

¹Аcademician V. Lazaryan Dnipropetrovsk National University of Railway Transport, ²Oles Honchar Dnipro National University

UDC622.457:519.6

Language: Ukrainian

Abstract.

The qualitative and quantitative composition of air is one of the microclimate components. For the decline of gassed level  there are different methods: setting of screens, air curtains. Application of the local suctions can be the effective method of decision of this task. For their practical use the special mathematical methods allowing to estimate their efficiency taking into account basic factors are needed: field of speeds of current of air, diffusion, geometrical form and sizes of  suctions.

Subject of the study was process of reducing level of air pollution. Objective of the work was to improve technology of two-level suction through the use of special guide plates, and, accordingly, to improve method of numerical calculation with taking into account change of the device geometry and to assess effectiveness of this type of suction. Basis for the calculation method improvement was physical experiment on assessing effectiveness of contaminated area reduction in the presence of anthropogenic source by the way of installing horizontal plates of the same length on the top of the suction holes. The airflow velocity field was calculated by the Laplace equation for the gas velocity potential. Process of impurity propagation in atmospheric air was modeled on the basis of two-dimensional mass transfer equation, solution of which was found by a finite-difference method. As a result of this research, method for calculating the field of concentration is improved by taking into account suction geometry and meteorological parameters of the environment. The developed software made it possible to carry out a number of calculations of pollutant concentration and to estimate areas of air polluted with carbon monoxide. Dependencies are established regarding the changing risk of chronic air intoxication with carbon monoxide over the period of 10 years. The obtained results are necessary for improving microclimate parameters in the working areas and further improving the process of gas extraction with two-level suction in order to reduce level of gas pollution of the air environment and reduce chronic intoxication of people in the zone of influence.

Keywords: two-level suction, physical experiment, risk of chronic intoxication, impurity concentration.

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About the authors:

Biliaiev Nikolay Nikolaevich, Doctor of Technical Sciences, Professor, Head of the Department Hydraulics and water supply, Academician V.  Lazaryan Dnipropetrovsk National University of Railway Transport, Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Rusakova Tatiana Ivanovna, Candidate of Technical Sciences (Ph. D), Associate Professor of the Department Aerohydrodynamics and Energy Mass Transfer, Oles Honchar Dnipro National University, Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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