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Orest Voznyak
Orest Voznyak
Department of Heat and Gas Supply and Ventilation, Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, St. Bandery, 12, 79013, Lviv - 13, Ukraine
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Olena Savchenko
Olena Savchenko
Department of Heat and Gas Supply and Ventilation, Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, St. Bandery, 12, 79013, Lviv - 13, Ukraine
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Nadiia Spodyniuk
n_spoduniuk@meta.ua
https://orcid.org/0000-0002-2865-9320
Nadiia Spodyniuk
Department of Heat and Power Engineering, Education and Research Institute of Energetics, Automation and Energy Efficiency, National University of Life and Environmental Sciences of Ukraine, Heroiv Oborony str, 12, Kyiv 03041, Ukraine
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Iryna Sukholova
Iryna Sukholova
Department of Heat and Gas Supply and Ventilation, Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, St. Bandery, 12, 79013, Lviv - 13, Ukraine
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Mariana Kasynets
Mariana Kasynets
Department of Heat and Gas Supply and Ventilation, Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, St. Bandery, 12, 79013, Lviv - 13, Ukraine
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Oleksandr Dovbush
Oleksandr Dovbush
Department of Heat and Gas Supply and Ventilation, Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, St. Bandery, 12, 79013, Lviv - 13, Ukraine
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Abstract
This article discusses the topical issue of improving the distribution of air in the premise due to application of the all type rectangular air streams: flat, axisymmetric and rectangular ones. The purpose of the article is research of the all types rectangular air streams, analytical dependencies obtaining for determination of the air velocity attenuation coefficient, aerodynamic local resistance coefficient and noise level from the ratio of slit length to its height; optimization of the inflow slit side's ratio. It has been established that increase of the inflow slit sides ratio results in the air velocity attenuation coefficient decrease and results in increase of the noise level and resistance coefficient of the rectangular slit. The optimal ratio of the sides of a rectangular slit is determined by the combination of aerodynamics and energetics, as well as of the sound power level.
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