Numerical study of the parallel vortex airfoil interaction

• Autorzy: Piechna J. , Szumowsk i A.
• Języki publikacji: EN

Abstrakty

EN

The effect of a strong vortex interacting with an airfoil flow is investigated numerically. The finite volume method for Euler equations is applied. Instantaneous flow patterns, including pressure distributions along the airfoil and lift coefficients, were calculated for various miss distances of the vortex passing parallely to the airfoil plane. It has been 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. The lift coefficient only slightly depends on the vortex core radius if the velocity induced at the airfoil surface by vortices of various cores is constant. In contrast to this the intensity of the acoustic disturbance produced during the interaction strongly depends on the core radius even for a constant induced flow velocity.

Słowa kluczowe

EN

parallel vortex airfoil interaction; numerical study; airfoil flow; finite volume method; instantaneous flow patterns; pressure distribution; lift coefficients

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 1998
• Tom: Vol. 2, No 2
• Strony: 357--372
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Piechna J.

• Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland

autor

Szumowsk i A.

• Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland

Bibliografia

• [1] Lee S. and Bershader D.. An Experimental and Computational Study of 2-D Parallel Blade - Vortex Interaction. AIA A Paper 91 -3277
• [2] Lee S. and Bershader D., Head - On Parallel Blade - Vortex Interaction, AIAA Journal Vol 1. No 1. i 994, pp 16-22
• [3] Damodaran M. and Caughey D., Finite — Volume Computation oflnviscid Transonic Airfoil - Vortex Interaction, AIAA Journal Vol 26, No 11, 1988, pp. 1346-1352
• [4] Ehrienfried K., Numerische Untersuchung von Wirbel-Tragflugel-Wechselxvirkungen im transsonischen Gcschwindigkeithereich, Max-Planck-Institut fuer Stroemungsfor- schung Report 8/1991
• [5] Gallman J., Parametric Computational Study of Isolated Blade-Vortex Interaction Noise, AI AA Journal Vol 32, No2. 1994, pp. 232-238
• [6] Szumowski A., Piechna J., Sclerowicz W. and Sobieraj G., Modified Formula for the Velocity Distribution in a Vortex, AIAA Journal (to be published)
• [7] Van Leer B., Flux- Vector Splitting for the Euler Equations, Lecture Notes in Physics. Vol. 170,1982, pp 507-512
• [8] Kaminski W. and Szumowski A., Acoustic Effects of Parallel Vortex-Airfoil Interaction, Journal of Sound and Vibration, 1995, 183(2) pp. 209-220