EXPERIMENTAL INVESTIGATIONS OF WALL INTERFERENCE EFFECT ON MODEL TEST RESULTS AT TSAGI T-106 WIND TUNNEL

摘要

This paper presents the results of an experimental investigation of the wall effect on model test results at the TsAGI T-106 transonic wind tunnel with a closed, circular-sectioned test section with perforated walls. The investigations were performed using a geometrically scaled model test approach. The results showed the existence of induced flow angularity, which changes with a change in the flow Mach number. It is shown that the direction of the wall-induced flow angularity corresponds to the open jet type of the flow borders, along with an insignificant change in the flow velocity axial component, depending on the model scale and angular position.