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2 Archives of Mechanics

2 1998

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Effect of miss-distance on the airfoil-vortex interaction Numerical study

Piechna J., Szumowski A.P.

Archives of Mechanics

1998

Vol. 50, nr 1

127-138

The effect of a strong vortex interacting with an airfoil flow is investigated numerically. The finite volume method for Euler equations is applied. Instantanous flow patterns, including pressure distributions along the airfoil and lift coefficients, were calculated for various miss-distances of the vortex passing parallel to the airfoil plane. It was found that the effects of interaction are much stronger when the vortex approaching the airfoil accelerates the flow at the pressure surface than in the case when the vortex decelerates the flow at the suction surface.

Effect of miss-distance on the airfoil-vortex interaction Experiment

Selerowicz W., Sobieraj G., Szumowski A. P., Piechna J.

Archives of Mechanics

1998

Vol. 50, nr 4

691-701

The effect of a strong vortex interacting with an airfoil flow is investigated experimentally by means of a shock tube. The experiments follow the previous theoretical work [11] on this subject. The instantaneous pressure distributions and histories of lift coefficient during the vortex passage are presented. The flow is visualised using the schlieren method. It is found that due to the viscosity of the air not taken into account in numerical study, the effect of miss-distance in the range of up to 0,5 chord length is weaker than it was initially predicted.