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On the Circulation Manifold for Two Adjacent Lifting Sections
Author(s) -
Zannetti L.,
Iollo A.
Publication year - 1999
Publication title -
zamm ‐ journal of applied mathematics and mechanics / zeitschrift für angewandte mathematik und mechanik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 51
eISSN - 1521-4001
pISSN - 0044-2267
DOI - 10.1002/(sici)1521-4001(199910)79:10<685::aid-zamm685>3.0.co;2-x
Subject(s) - secondary circulation , geometry , maxima and minima , physics , circulation (fluid dynamics) , geology , mathematics , meteorology , mathematical analysis , mechanics
The circulation functional relative to the potential flow past two adjacent lifting sections is studied for two cases. In the first case we consider two adjacent circles. The circulation is computed as a function of the displacement of the secondary circle along the axis joining the two centers and of the angle of attack of the secondary circle. The gradient of such functional is computed by deriving a set of elliptic functions with respect both to their argument and to their period. In the second case studied, we considered a wing‐flap configuration. The circulation is computed by some implicit mappings, whose differentials with respect to the variation of the geometrical configuration in the physical space are found by divided differences. Configurations giving rise to local maxima and minima in the circulation manifold are presented.