Dynamic Force and Pressure Measurements on an Oscillating Delta Wing at Low Speeds

Abstract

This report presents the results of static and dynamic measurements performed on a 65* cropped-delta wing with a sharp leading edge. the measurements have been carried out in the Low Speed Windtunnel DNW-NWB located in Braunschweig, Germany in 1994 and 1995. The model performed oscillations in the modes pitch, yaw and roll about a windtunnel-fixed axis, the mean angle of attack ranged from 0* to 48*, the parameters Reynoldsnumber, reduced frequency and oscillation amplitude have been varied. The measurements comprised 6-component balance measurements and pressure measurements on pressure taps located in 3 sections x/c*&#61const. on the upper and lower surface of the model. The results are presented in form of amplitudes and phase angles of the first three harmonics of the oscillation frequency, which have undergone an analysis of variance in order to obtain results with respect to the significance of the variation of the above.