Experimental Study of the Flow Around Two Scaled 3D Swept Wings

摘要

The paper describes the results of an extensive experimental investigation of the211u001ethree-dimensioinal turbulent boundary-layers on both sides of a swept wing and 211u001eits wake. Although the experiment was carried out at low speed, the shape of the 211u001ewing was designed such as to obtain flow conditions resembling those on practical 211u001etransonic swept wings, with emphasis on the three-dimensionality of the viscous 211u001eflow. Mean velocity profiles were determined at nearly 300 stations, while full 211u001e3D turbulence measurements were executed at over 200 stations. A special and 211u001eprobably unique feature is that a complete independent check was obtained by 211u001eexecuting measurements at the same Reynolds number on two scaled test set-ups in 211u001etwo wind tunnels (the ONERA-F2 and the NLR-LST) using a number of different 211u001emeasurement techniques. This fact, together with an extensive error-analysis, has 211u001econtributed significantly to the reliability of the experimental data and also 211u001egives an impression of the uncertainty range of the data.