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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN On-line: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2013010128
pages 387-404

ENGINEERING TECHNIQUE OF CORRECTING THE MAXIMAL LIFT COEFFICIENT OF MODELS FOR THE FULL-SCALE FLIGHT CONDITIONS

Gennadiy Andreevich Fedorenko
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, 140180, Russia

RESUMO

Results of experimental research of models of lifting surfaces (airfoil sections, half-wings, aircraft configurations) in wind tunnels (WTs) are analyzed for influence of Reynolds number, initial degree of flow turbulence, and roughness of model surface on the maximal lift coefficient CLa max. It is shown that, on one hand, the maximal lift coefficient of an aircraft in full-scale flight cannot exceed maximal threshold CLa max ∞ obtained for an aerodynamically smooth model in WT, and, on the other hand, it cannot be lower than minimal threshold CLa max(min)∞ obtained for a completely turbulent boundary layer over a model. The technique of correcting the maximal lift coefficient CLa max of models for the full-scale flight conditions is presented in this work.


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