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TsAGI Science Journal

ISSN Imprimir: 1948-2590
ISSN En Línea: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2012004705
pages 845-851

EXPERIMENTAL INVESTIGATION OF STATIC PRESSURES ON THE UPPER SURFACE OF A PASSENGER AIRCRAFT MODEL AT QUASI-STEP-WISE VARIATIONS OF THE PITCH ANGLE IN SEPARATION FLOW REGIMES

Evgueny Aleksandrovich Chasovnikov
Siberian Aeronautical Research Institute Named after S.A. Chaplygin (SibNIA), 21, Polzunov Street, Novosibirsk, 630051 Russia

SINOPSIS

Transitions of static pressure on the upper surface of the wing and horizontal tail during fast displacement of the model from small to high angles of attack are obtained. The behavior of the transitions on the wing and on the horizontal tail is found to be significantly different. The process of relaxation of loads is revealed to be exponential and characterized by dimensionless time constants T ≈ 4 − 6 for the wing and, accordingly, T ≈ 13 − 14 for the horizontal tail.