Browsing by Author "Ščibran, Petr"
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- ItemVliv tvaru hnací trysky na proudění ve vzduchových ejektorech(Technická Univerzita v Liberci, 2007) Ščibran, Petr; Dvořák, VáclavDiploma thesis deals with mixing two air streams in a cylindrical mixing chamber of a subsonic ejector. For the mixture examination experimental measuring and 3D numerical models of the Fluent programme were used. Results of these measures were compared to the results of numerical calculations, one-dimensional method, and an analytical method for six different shapes of propelling nozzles. Ejector performance characteristics, its efficiency, velocity and intensity turbulence profiles in the mixing chamber, pressure distribution on the walls of the chamber, and the pattern of pressure and momentum coefficient along the mixing chamber axis were compared. The fastest mixing of flows occurs when multiple and cross nozzles are used. Highest efficiency is, however, obtained when a circular propulsive nozzle is used.