Winglets on low aspect ratio wingsThe drag reduction potentially available from the use of winglets at the tips of low aspect ratio (1.75-2.67) wings with pronounced (45-60 deg) leading edge sweep is assessed numerically for the case of a cruise design point at Mach of 0.8 and a lift coefficient of 0.3. Both wing-winglet and wing-alone design geometries are derived from a linear-theory, minimum induced drag design methodology. Relative performance is evaluated with a nonlinear extended small disturbance potential flow analysis code. Predicted lift coefficient/pressure drag coefficient increases at equal lift for the wing-winglet configurations over the wing-alone planform are of the order of 14.6-15.8, when boundary layer interaction is included.
Document ID
19870061823
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kuhlman, John M. (West Virginia Univ. Morgantown, VA, United States)
Liaw, Paul (West Virginia, University Morgantown, United States)