简介:A novel support mechanism for a wind tunnel model is designed, built, and demonstrated
on an aerodynamic platform undergoing dynamic maneuvers, tested with periodic motions up to
20 Hz. The platform is supported by a 6简介:A novel support mechanism for a wind tunnel model is designed, built, and demonstrated
on an aerodynamic platform undergoing dynamic maneuvers, tested with periodic motions up to
20 Hz. The platform is supported by a 6-DOF (six degrees of freedom) traverse that utilizes eight
thin wires, each mounted to a servo motor with an in-line load cell to accurately monitor or control
the platform motion and force responses. The system is designed such that simultaneous control of
the servo motors effects motion within 50 mm translations, 15 pitch, 9 yaw, and 8 roll at
lower frequencies. The traverse tracks a desired trajectory and resolves the induced forces on the
platform at 1 kHz. The effected motion of the platform is measured at 0.6 kHz with a motion capture
system, which utilizes six near-infrared (NIR) cameras for full spatial and temporal resolution of the
platform motion, which is used for feedback control. The traverse allows different platform model
geometries to be tested, and the present work demonstrates its capabilities on an axisymmetric bluff
body. Programmable timed outputs are synchronized relative to the model motion and can be used
for triggering external systems and processes. In the present study, particle image velocimetry (PIV)
is used to characterize the realized wakes of the platform undergoing canonical motions that are
effected by this new wind tunnel traverse.详细>