Winglet effects on the flutter of twin-engine-transport type wingFlutter characteristics of a cantilevered high aspect ratio wing with winglet were investigated. The configuration represented a current technology, twin-engine airplane. A low-speed and a high-speed model were used to evaluate compressibility effects through transonic Mach numbers and a wide range of mass-density ratios. Four flutter mechanisms were obtained in test, as well as analysis from various combinations of configuration parameters. The coupling between wing tip vertical and chordwise motions was shown to have significant effect under some conditions. It is concluded that, for the flutter model configurations studied, the winglet related flutter was amenable to the conventional flutter analysis techniques.
Document ID
19840052120
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bhatia, K. G. (Boeing Commercial Airplane Co. Seattle, WA, United States)
Nagaraja, K. S. (Boeing Commercial Airplane Co. Seattle, WA, United States)
Ruhlin, C. L. (NASA Langley Research Center Configuration Aeroelasticity Branch, Hampton, VA, United States)