Unsteady Transonic Pressure Measurements on a Semi-Span Wind Tunnel Model of a Transport-Type Supercritical Wing (LANN) Lockheed-Georgia, Air Force, NASA, and NLR Model. Part 2. Pressure Distributions (PLOTTED) and Plots of the Vi

摘要

Unsteady transonic pressure measurements have been performed on a semi-span wind-tunnel model of a transport-type supercritical wing, oscillating in pitch. For each run, the vibration mode and detailed steady and unsteady pressure distributions have been measured. Sectional as well as wing aerodynamic coefficients have been obtained by integration of the pressure distributions. The tests covered a Mach number range between 0.62 and 0.95. The reduced frequency covered a range between zero and a maximum value varying from 0.3 at M = 0.62 to 0.2 at M = 0.95 (related to half mean aerodynamic chord). Part I of the report presents the general description, the aerodynamic coefficients (printed and plotted vs. incidence, reduced frequency and Mach number and the vibration modes. Part II presents the plotted pressure distributions and vibrations modes. (Author)