Discrete sweeping jets as tools for improving the performance of the V-22

Roman Seele, Philipp Tewes, René Woszidlo, Michael A. McVeigh, Nathaniel J. Lucas, Israel J. Wygnanski

Research output: Contribution to journalArticle

92 Scopus citations

Abstract

Experiments aimed at delaying flow separation through discrete jets pointing in the direction of streaming and sweeping side to side along the span were conducted on a V-22 airfoil with and without deflected trailing-edge flaps. The results indicated substantial drag reduction and lift increase at moderately low inputs of mass and momentum. Additional experiments were carried out on a semispan V-22 wing/nacelle combination, and they too provided an increase in lift-to-drag ratio L/D of approximately 60% (although active flow control was applied to the wing only). The effectiveness of the sweeping jets on reducing the download force acting on a V-22 full-span powered model in hover was also examined. A 29% reduction in download was realized using the embedded sweeping jets, corresponding approximately to a 2000 lb increase in hover lift.

Original languageEnglish (US)
Pages (from-to)2098-2106
Number of pages9
JournalJournal of Aircraft
Volume46
Issue number6
DOIs
StatePublished - Jan 1 2009

ASJC Scopus subject areas

  • Aerospace Engineering

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