The Unsteady Forces on Flat‐Plate‐Airfoils in Cascade Moving through Sinusoidal Gusts

Abstract

AbstractThis paper presents an analysis for the determination of the lift fluctuation on flat‐plate‐airfoils in cascade due to transverse and chordwise gusts. The acceleration potential method is used in combination with conformal mapping method. This method gives an utterly simple analysis even for cascades, without the complicated integral equations enevitable for the determination, of vortex distribution in velocity‐field analysis. The computational results show that the pitch and the stagger angle of the cascade have much influence upon the magnitude of the fluctuating lift, but not so much upon phase angle.