Archive - Известия Казанского государственного архитектурно-строительного университета.

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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Posohin V.N. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kareeva J.R. – candidate of technical sciences, assistant 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
Title of the articleAbout pressure loss at jet flow in limited spaces
Abstract.Based on previous results pressure loss and coefficients of local resistance for different schemes of inflow and outflow in ventilation spaces are defined. Jet flows in flat and cylindrical dead-end, flat flowing channel, channel with out-of-alignment inflow and outflow are considered. Values of overpressure depend on longitudinal and transversal constrained parameters. It can be essential and it has to be considered at aerodynamic calculation of ventilation systems. Calculation is carried out numerically with the help of program complex Fluent. To close the system of equations of turbulent motion «standard» k – ? model is accepted (k – kinetic energy of turbulent fluctuations, ? – dissipation rate). In the simulation, the wall boundary layers used advanced modeling parietal (Enhanced Wall Treatment). The results show that increasing the value of the cross constrained leads to a drastic change in the value of the local resistance coefficient. Parameter longitudinal constrained on the contrary has no appreciable effect on the value of coefficient of local resistance. The smallest value of the value of coefficient of local resistance takes for the flow of the jet in the flowing channel, the largest – in the flow of the jet in the channel with the out-of-alignment inflow and outflow.
Keywords.constrained jets, constrained parameters, pressure loss, coefficient of local resistance, numerical method.
For citations:Posohin V.N., Kareeva J.R. About pressure loss at jet flow in limited spaces // Izvestiya KGASU. 2016. №2(36) P.146-150.

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