| 摘要 |
FIELD: experimental aerodynamics. SUBSTANCE: device has bed frame 1 with two longitudinal guide beams projecting as cantilevers with carriage 4 arranged between them; connected to carriage 4 is parallel link mechanism formed by rectangular strut 7 telescopically fitted in carriage, turntable for securing the base of holder, rod 13 and double-arm lever 11 with fixed point of suspension. Strut 7 is connected to end of carriage by means of two flat guides. Double-arm lever 11 is connected to bedframe 1 and embraces its cantilever portion on the outside. To shift the center of rotation of model along wind tunnel axis, longitudinal beams of bedframe 1 are provided with additional guides over which hinged supports 12 of double-arm lever moves. Hinged supports 12 are provided with locks 15 for securing them relative to bedframe in case of change of angle of attack and locks 16 for securing them relative to turntable in case of displacement of model along wind tunnel axis. For introducing the model in flow after starting the wind tunnel, turntable is made in form of elbow and is provided with additional movable base for securing the holder with guides and drive. To change the angle of yaw of model, bedframe 1 is provided with rotary motion drive whose center of rotation is located radially and coincides with center of rotation of model. Bedframe is mounted on circular guides or on swivel axle radially secured in working portion of wind tunnel. EFFECT: extended range of displacement, reliability of carrying the lateral loads and aerodynamic force moments. 4 cl, 5 dwg |
