Absolute instabilities of a finite lenght vortex street with external axial velocities

• Autorzy: Chiu T. W. , Berney A. H.
• Konferencja: Conference on Numerical Method in Continuum Mechanics (6 ; 16-18.09.1996 ; Stará Lesná, Słowacja)
• Języki publikacji: EN

Abstrakty

EN

This paper presents a numerical algorithm for the study of the absolute instability of a vortex street with external axial velocities and finite length vortices. The aim is that this will be of relevance to the study of the flow over slender bodies at yaw. The algorithm is based on the vortex dynamics momentum equation. Special core treatments have been implemented to tackle the problem of infinite self-induced velocity. A small pertubation method is then used to formulate the eigenvalue problem.

Słowa kluczowe

EN

vortex street; instability

PL

aleja wirowa; niestateczność

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Computer Assisted Mechanics and Engineering Sciences
• Rocznik: 1998
• Tom: Vol. 5, nr 2
• Strony: 161--172
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Chiu T. W.

• School of Engineering, University of Exter, Exeter EX4 4QF, United Kingdom

autor

Berney A. H.

• School of Engineering, University of Exter, Exeter EX4 4QF, United Kingdom

Bibliografia

• [1] T.W. Chiu, L.C. Squire. An Expermental Study of the Slow over a Train in a Crosswind at Large Yaw Angles up to 90°. J. Wind Eng. & Ind. Aerodyn., 45: 47-74, 1992.
• [2] D. Degani, G.G. Zilliac. Experimental Study of Nonsteady Asymmetric Flow around an Ogive Cylinder at Incidence. AIAA Journal, 28(4): 642-649, 1990.
• [3] G.G. Zilliac, D. Degani, M. Tobak. Asymmetric Vortices on a Slender Body of Revolution. AIAA Journal, 29(5): 667-675, 1991.
• [4] D.W. Moore and P.G. Saffman. The Motion of a Vortex Filament with Axial Flow. Transactions of the Royal Society of London, 272: 403-429, 1972.
• [5] A.H. Berney, T.W. Chiu and C.J. Baker. Inverstigation of the Stability of the Vortex Wake Behind a Slender Body at Yaw using a Combined Boundary Element and Vortex Dynamics Algorithm. Proceedings of the International Conference on Numerical Method in Continuum Mechanics, 9-16, High Tatras, Slovakia, 19-22 September, 1994.
• [6] O.C. Zienkiewicz and R.L. Taylor. The Finite Element Method, 4th ed., vol 2, 539-041. McGraw-Hill, London, 1991.
• [7] L.M. Milne-Thomson. Theoretical Hydrodynamics. MacMillan & Co Ltd, London, 1962.