Experimental studies of free flow boundaries influence upon aerodynamic characteristics of the clean large-scale models

In this paper, the expediency of increasing the relative sizes in clean models of wings and aircraft layouts in the low-speed open working section wind tunnels with a circular nozzle section is considered. Also determined is an additional correction, which makes it possible to take into account the external atmospheric pressure influence upon the aerodynamic characteristics of large-scale models and enhance the efficiency of the low-speed wind tunnels.