The elastic wing model, its excitation and comprehensive high frequency measuring equipment for the High Reynolds Number Aero-Structural Dynamics (HIRENASD) tests in the European Transonic Windtunnel (ETW) are shortly described. Some of the stationary polars are presented in terms of wing deformation, as well as aerodynamic coefficients and pressure distributions. Then unsteady processes observed in the measurements of static aerodynamic coefficients, are regarded with focus on small amplitude pressure waves travelling upstream from the trailing edge and triggering periodically break-down and redeployment of the local supersonic domains with transonic shock waves to run upstream and to disappear. Another focus is on stochastic vibrations excitation while moving forward during nominally static experiments. Emphasis is put on measured variations of pressure distribution on the wing surface caused by defined vibration excitation applying internal force couples at the wing root, whereby the exciter frequencies were chosen close to natural frequencies of the wing model. Phase and magnitude of measured local lift fluctuations as well as real and imaginary parts of pressure distributions are presented.
Aero-structural Dynamics Experiments at High Reynolds Numbers
Summary of Flow Modulation and Fluid-Structure Interaction Findings ; Chapter : 15 ; 389-424
2010-01-01
36 pages
Article/Chapter (Book)
Electronic Resource
English
Mach Number , Wind Tunnel , Suction Side , Pressure Side , Wing Model Engineering , Aerospace Technology and Astronautics , Classical and Continuum Physics , Engineering Fluid Dynamics , Mathematical and Computational Engineering , Fluid- and Aerodynamics , Numerical and Computational Physics, Simulation
Aero-structural Dynamics Experiments at High Reynolds Numbers
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