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Some Experiments with Vortex Breakdown

  • M. V. Lowson (a1)


Water tunnel flow visualisation experiments on a slender delta wing have revealed some new phenomena connected with vortex breakdown. Vortex breakdown hysteresis has been found, there being two steady flow states at some incidences, one with breakdown on the wing and one without. The formation of vortex breakdown has been studied and found to be a non-axisymmetric instability. It is suggested that pressure gradient plays a more general part in the phenomenon than has been thought hitherto.



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1.Elle, B. J. An Investigation at Low Speed of the Flow Near the Apex of Thin Delta Wings With Sharp Leading Edges. R & M 3176, ARC 19 780.
2.Lambourne, N. C. and Bryer, D. W. The Bursting of Leading Edge Vortices—Some Observations and Discussions of the Phenomenon. ARC 22 775, R & M 3282, April 1961.
3.Squire, H. B. Analysis of the Vortex Breakdown Phenomenon, Part II. ARC 22 350.
4.Jones, J. P. The Breakdown of Vortices in Separated Flow. Dept. of Aero, and Astro., Univ. of Southampton. Rep. 140.
5.Ludweig, H. Contribution to the Explanation of the Instability of Vortex Cores Above Lifting Delta Wings. ARC 22 851.
6.Brooke-Benjamin, T.Theory of the Vortex Breakdown Phenomenon. Journal of Fluid Mechanics, Vol. 14, Part 4, pp. 593629, 1962.
7.Jones, J. P. A Note on Prof. Squire's Analysis of the Vortex Breakdown Phenomenon. ARC 22 142.

Some Experiments with Vortex Breakdown

  • M. V. Lowson (a1)


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