Experimental Investigation of Bistable Winglets to Enhance Aircraft Wing Lift Takeoff Capability

Autor:	A. Gatto, Michael I. Friswell, F Mattioni
Rok vydání:	2009
Předmět:	Engineering Lift coefficient Wing business.product_category business.industry Aerospace Engineering Structural engineering Airplane Lift (force) Flight envelope Swept wing Wingtip device Takeoff business
Zdroj:	Journal of Aircraft. 46:647-655
ISSN:	1533-3868 0021-8669
DOI:	10.2514/1.39614
Popis:	An experimental investigation into the use of a bistable winglet to enhance the lift characteristics of a wing transitioning from lower to higher subsonic flow speeds is presented in this paper. The concept centers around the use of a specifically designed composite winglet, manufactured with an unsymmetric layup, which, when increasingly loaded, snaps between two stable states. Initially, during low-speed operation, the winglet is fixed in one stable state that is specifically designed to be cambered, thus enhancing the lift capability of the wing. At higher dynamic pressures, the winglet snaps to a configuration more intuitive and conventional to current winglet design. Results presented in this paper show the concept to be viable at enhancing the lift produced by a swept wing as aerodynamic loading increases before snap-through. During snap-through, however, the absence of any method of controlling the snap-through process generated significant dynamic loading that was transmitted, unhindered, throughout the entire test rig.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c2643f80e23c67ebe75cee2dcd6779d https://doi.org/10.2514/1.39614 Zobrazit plný text záznamu