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UBC Theses and Dissertations

Experimental investigation of the instability of a trailing vortex pair Eliason, Brent G


The mutual instability of a trailing vortex pair has been studied in the Department's large wind tunnel. The vortices were visualized using helium filled soap bubbles and the cores probed with a hot wire anemometer. Measurements were made to permit calculation of the wing lift, the circulation of the trailing vortices, the vortex separation, the diameter of the vortex cores and the wavelength and plane of oscillation of the disturbed vortices. The results show that the linear theories of Crow and Parks closely predict the initial growth of the instability.

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