METHOD OF AND DEVICE FOR DETERMINING AERODYNAMIC CHARACTERISTICS OF VEHICLE OR VEHICLE MODEL

摘要

FIELD: transport engineering; designing of vehicles of different application. SUBSTANCE: device has drive 8 to provide change of angle of incidence of vehicle model, holder consisting of movable member 5 and fixed member 6 connected to each other. Movable member 5 is connected with roll angle adjustment drive. Fixed member 6 is connected with unit 7 fastening the holder in aerodynamic tunnel. End face of holder fixed member 6 is made in form of ball support 9 with hole in its surface, and end face of holder movable member 5 is made in form of spherical shell 10 accommodating ball support 9. Bracket 11 is rigidly mounted on inner wall of movable member 5. Bracket is passed through hole into ball support 9 and is cantilever-connected with drive 8 changing angle of incidence of model. invention makes it possible to increase efficiency of investigation by cutting down time taken for operation in aerodynamic tunnel, increase accuracy of determining of aerodynamic characteristics and range of investigation of influence of angle of incidence, as compared with standard devices. Aerodynamic characteristic grids can be obtained depending on change in angles of incidence and roll of vehicle model, and aerodynamic characteristics for specific trajectories according to preset mode of change in angle of incidence and roll in time by moving the model at required speeds provided by drive. EFFECT: improved efficiency of investigation. 3 cl, 4 dwg