A large-scale experimental investigation using the 55%-scale Subsonic High Alpha Research Concept (SHARC) was performed in the NASA Ames Research Center 40-by 80-ft Wind T\mnel. The SHARC configuration represents an advanced low-observable fighter aircraft, and features a clipped diamond wing with leading-and trailing-edge sweep angles of ±40 deg, a chined forebody, leading-edge extensions, and a vee-tail. Data covering the angle of attack range from -4 deg to +42.4 deg, and sideslip angles ranging from -10 deg to +10 deg were acquired at a dynamic pressure of 40 psf. Test data are presented for symmetric and asymmetric wing jet nozzle blowing. Blowing coefficient values ranged from a minimum of 0.005 to a maximum of 0.020. The results indicate that wing jet nozzle blowing is an effective lift-enhancement device, giving an across-the-board net increase in lift over the entire angle-of-attack range tested. The jets were also found to improve the aircraft's drag polar. Roll control using asymmetric jet blowing equaled or exceeded that available via the deflection of only a single aileron. Nomenclature C D = drag coefficient, stability axis C L -lift coefficient, stability axis C Lmax = maximum lift coefficient C, = rolling moment, body axis C n = yaw moment, body axis C^ = blowing coefficient c = wing mean aerodynamic chord LID = lift-to-drag ratio L/D max = maximum lift-to-drag ratio V = tunnel freestream velocity, ft/s a = angle of attack, deg /3 = angle of sideslip, deg A = delta or incremental AC L /C M = augmentation ratio 8 = control surface deflection angle, deg A*, = jet nozzle orientation angle, deg 4> = jet nozzle inclination angle, deg
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.