About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Yulia R. Kareeva, candidate of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-9497-349X Mariya B. Chukhlova, specialist of department IAS of scientific research, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-1678-8168 Arslan M. Ziganshin, doctor of technical sciences, professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0001-7335-7797 |
| Title of the article | Flow in the “grille-elbow” unit of the exhaust ventilation systems |
| Abstract. | The presence of sharp edges and uneven velocity distribution in the elements of ventilation systems leads to flow separation, the occurrence of vortex zones, which, in turn, leads to a decrease in the efficiency of ventilation systems. One of the options for equalizing the flow is the installation of grilles with lamellas, guide vanes. The aim of the study is to identify the dependence of the air flow characteristics in the exhaust duct on the distance between the elements of the “grill-elbow” unit. To achieve this goal, the following problems are solved: numerical study of the flow in the exhaust duct with a “grill-elbow” unit; determination of the dependencies of the sizes of vortex zones, local drag coefficients on the distance between the elements of the unit; comparison of the obtained results with known data. Results: the flow streamlines, the dependencies of the local drag coefficient of the unit and the effective area of the exhaust grille for different distances in the unit were constructed, the outlines and sizes of the vortex zones were determined. Conclusions: the obtained dependencies can be taken into account when designing exhaust ventilation systems in buildings for various purposes. |
| Keywords. | numerical study, “exhaust opening-elbow” node, “grill-elbow” node, LDC, vortex zone |
| For citations: | Kareeva Yu.R., Chukhlova M.B., Ziganshin A.M. Flow in the "grille-elbow" unit of the exhaust ventilation systems // News of KSUAE, 2025, p. 55-64, DOI: 10.48612/NewsKSUAE/72.5, EDN: CJZREC |
