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Regularities for Resistance of Supply and Exhaust Ventilation Cross Junctions
https://orcid.org/http://orcid.org/0000-0001-7335-7797
https://orcid.org/http://orcid.org/0000-0001-5466-9744
https://orcid.org/http://orcid.org/0000-0002-2971-8564
https://orcid.org/http://orcid.org/0000-0003-0632-6784
Today the problem of designing and constructing of energy efficient ventilation system is relevant. One of the ways to decrease energy consumption of such system is to use the outlines of vortex zones to create shaped fitting elements. To develop this idea, a study of numerical models of supply and exhaust crosses is being carried out. The dependences of their local drag coefficients (for the passage in the forward direction and for the side branch) are determined when the ratio of the air flow through the side branch to the total flow rate is in the range from 0.1 to 0.45. The study is carried out numerically, with a detailed comparison with known experimental data on the resistance of such crosses. For diverging (supply) crosses, well-known sources recommend using data on the resistance of tees. For converging (exhaust) crosses, there are data on local drag coefficients for crosses. A qualitative agreement was obtained for the behavior of the local drag coefficients, but at the same time, a quantitative difference in the determined dependencies was also obtained. Next, a study of the outlines of the vortex zones will be carried out and the resulting numerical model will be used to determine them in the entire range of changes in the air flow ratio, as well as to develop designs for energy-efficient shaped crosses.
Regularities for Resistance of Supply and Exhaust Ventilation Cross Junctions
https://orcid.org/http://orcid.org/0000-0001-7335-7797
https://orcid.org/http://orcid.org/0000-0001-5466-9744
https://orcid.org/http://orcid.org/0000-0002-2971-8564
https://orcid.org/http://orcid.org/0000-0003-0632-6784
Today the problem of designing and constructing of energy efficient ventilation system is relevant. One of the ways to decrease energy consumption of such system is to use the outlines of vortex zones to create shaped fitting elements. To develop this idea, a study of numerical models of supply and exhaust crosses is being carried out. The dependences of their local drag coefficients (for the passage in the forward direction and for the side branch) are determined when the ratio of the air flow through the side branch to the total flow rate is in the range from 0.1 to 0.45. The study is carried out numerically, with a detailed comparison with known experimental data on the resistance of such crosses. For diverging (supply) crosses, well-known sources recommend using data on the resistance of tees. For converging (exhaust) crosses, there are data on local drag coefficients for crosses. A qualitative agreement was obtained for the behavior of the local drag coefficients, but at the same time, a quantitative difference in the determined dependencies was also obtained. Next, a study of the outlines of the vortex zones will be carried out and the resulting numerical model will be used to determine them in the entire range of changes in the air flow ratio, as well as to develop designs for energy-efficient shaped crosses.
Regularities for Resistance of Supply and Exhaust Ventilation Cross Junctions
https://orcid.org/http://orcid.org/0000-0001-7335-7797
https://orcid.org/http://orcid.org/0000-0001-5466-9744
https://orcid.org/http://orcid.org/0000-0002-2971-8564
https://orcid.org/http://orcid.org/0000-0003-0632-6784
Today the problem of designing and constructing of energy efficient ventilation system is relevant. One of the ways to decrease energy consumption of such system is to use the outlines of vortex zones to create shaped fitting elements. To develop this idea, a study of numerical models of supply and exhaust crosses is being carried out. The dependences of their local drag coefficients (for the passage in the forward direction and for the side branch) are determined when the ratio of the air flow through the side branch to the total flow rate is in the range from 0.1 to 0.45. The study is carried out numerically, with a detailed comparison with known experimental data on the resistance of such crosses. For diverging (supply) crosses, well-known sources recommend using data on the resistance of tees. For converging (exhaust) crosses, there are data on local drag coefficients for crosses. A qualitative agreement was obtained for the behavior of the local drag coefficients, but at the same time, a quantitative difference in the determined dependencies was also obtained. Next, a study of the outlines of the vortex zones will be carried out and the resulting numerical model will be used to determine them in the entire range of changes in the air flow ratio, as well as to develop designs for energy-efficient shaped crosses.
Regularities for Resistance of Supply and Exhaust Ventilation Cross Junctions
Lecture Notes in Civil Engineering
Vatin, Nikolai (editor) / Ziganshin, Arslan (author) / Karimullin, Timur (author) / Yagfarov, Emil (author) / Logachev, Konstantin (author)
International Scientific Conference on Socio-Technical Construction and Civil Engineering ; 2022 ; Kazan, Russia
2022-09-30
8 pages
Article/Chapter (Book)
Electronic Resource
English
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