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. | Kareeva Juliya Rustemovna candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Varsegova Evgenia Vladislavovna candidate of physical-mathematical sciences, associate professor E-mail: 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 Bliznyakova Ksenia Andreevna engineer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LLC «Mak Engineering» The organization address: 420111, Russia, Kazan, Kremlevskaya st., 25/22 Zakieva Raushan Rinatovna engineer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LLC «Project artel of Angelika Melentieva» The organization address: 420066, Russia, Kazan, Soldatskaya st., 8, of. 11 |
| Title of the article | Research of the geometrical parameters of air inlet hole influence on the characteristics of jet |
| Abstract. | Problem statement. While considering the air exchange scheme in the room with heat release the most effective is the air-jet supplying directly into the working area. To avoid inaccuracies in the design calculations, it is necessary to ensure the irregularity of the velocity profiles in the jets, which are formed from the outflows from the nozzles of different geometry and direction of the branch pipe. However, the outflows of jets from the nozzles located immediately behind the direct turn and oriented at different angles to the horizon, remain practically unexplored. The purpose of the calculation is to determine the influence of the distance from the direct turn of the air duct to the inlet on the characteristics of the forming jet. Outflow irregularity is investigated numerically using the Fluent software package. Results. As a result of the numerical solution, the flow streamlines were constructed for several geometries of a horizontally located nozzle, and the main characteristics of the jet at the outlet were determined: the profiles of the longitudinal and transverse components of the velocity, the change in static pressure, and the angle of the jet outflow. The research results are presented in dimensionless form. It was found that the formation of the velocity and pressure field in the jet is influenced by the relative position of the supply nozzle and the previous rotation. It was found that when the inlet is located in the immediate vicinity of the turn, the velocity profiles have a strong unevenness, and the jet flows out at an angle to the horizon. When moving away from the turn, the jet is leveled, the transverse velocity component does not affect the jet, and the outflow angle tends to horizontal. Conclusions. The significance of the results obtained for the construction industry lies in the fact that they can be used to calculate the air distribution and circulation of air masses in ventilated rooms. |
| Keywords. | numerical methods, flow characteristics, velocity profile, vortex zone, computational fluid dynamics. |
| For citations: | Kareeva Ju.R., Varsegova E.V., Ksenia B.A., Raushan Z.R. Research of the geometrical parameters of air inlet hole influence on the characteristics of jet // Izvestiya KGASU. 2020. №4(54) P.104-111. |
