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Journal of Applied Mechanics and Technical Physics

2020 year, number 3

Vortex Pair of Coaxial Helical Filaments

V. L. Okulov1,2
1Novosibirsk State University, Novosibirsk, 630090 Russia
2Technical University of Denmark, DK-2800 Lyngby, Denmark
Keywords: вихревая динамика, винтовой вихрь, вихревая пара, равновесное вращение, vortex dynamics, helical vortex, vortex pair, equilibrium rotation

Abstract

Possible existence of vortex pairs of coaxially rotating helical filaments with circulation in the opposite directions is theoretically studied. Such pairs are generated, e.g., by a rotating blade of the rotor with identical intensities of the tip and shifted axial vortices. Conditions that ensure uniform rotation of the vortex pair of helical filaments are found, which is needed for modeling vortex wakes behind rotor blades.