In the article there are analyzed analytically and given approximate numerical values of resistance and flow characteristics of free air flowing through the end vent hole of cylindrical pipeline in unlimited space.
By using CFD-simulation, plug length simulation of local resistance type plugged tee, which changes the flow direction, using equations of hydrodynamics was carried out. During simulation, velocity of medium in the thread of the collector system in which local input resistance was plugged tee, which changes the flow direction, was measured. Herewith for determination of this velocity and reduction of its distortion collector system simulation at different plug lengths was carried out.