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. | Ziganshin Arslan Malikovich candidate of technical sciences, associate professor Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 Safiullina Guzel’ Ramilevna HVAC design engineer Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LTD «Metropolis» The organization address: 129085, Russia, Moscow, Godovikov st., 9, bldg. 5 Eremina Svetlana Vladimirovna assistant of technical engineer Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LTD «VT Strojinzhiniring» The organization address: 420036, Russia, Kazan, Kopylov st., 1/2 Gayfullin Amir Ayratovich engineer of ventilation system Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LTD «REU Sfera» The organization address: 420073, Russia, Kazan, Gastello st., 20 |
| Title of the article | Validation of a numerical model of a flow in an exhaust and supply symmetrical ventilation tees |
| Abstract. | Problem statement. A large amount of energy in ventilation systems is spent on overcoming resistance in duct fitting elements due to vortex formation. Elimination of vortex formation is possible by shaping along with the outlines of vortex zones and most efficiently carried out by numerical modelling. The aim of the study is a validation of the numerical model, which is carried out by comparing the obtained numerical results with experimental or analytical data, both in resistance and in the outlines of vortex zones when solving a test problem. Results. The article presents the results of setting a numerical model of airflow in the exhaust and supply symmetrical ventilation tee, by comparing the obtained results with the data of other researchers and our experiment. The values of the local drag coefficients and the outlines of vortex zones are determined for a different combination of the most universal models of turbulence and methods of near-wall modelling that are used in modelling flows in channels. The closest results are shown by the combination of the «standard» k-? model with the «enhanced wall treatments». Conclusions. The developed computer models of the supply and exhaust tee further will be used to numerically determine the local drag coefficient and the outlines of vortex zones for the entire range of variation of the ratio of airflow rates flowing through the side channel to the flow rate in the main channel. The resulting outlines of the vortex zones will be used to develop the energy-efficient shaped tees. Usage of these improved duct fittings will reduce the energy consumption of ventilation systems of buildings and facilities. |
| Keywords. | ventilation, symmetrical tee, vortex zones, energy saving, pressure loss reduction, computational fluid dynamics, experiment. |
| For citations: | Ziganshin A. M., Safiullina G. R., Eremina S. V., Gayfullin A. A. Validation of a numerical model of a flow in an exhaust and supply symmetrical ventilation tees // Izvestiya KGASU. 2021. № 1 (55). Р. 58–70. DOI: 10.52409/20731523_2021_1_58. |
