Effect of ribbing of the internal rotating cylinder in the Couette-Taylor system on the drag torque value
V.N. Mamonov, N.B. Miskiv, A.D. Nazarov, A.F. Serov, V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: Couette-Taylor system, rotating cylinders, energy dissipation, antitorque moment, ribs
Abstract
The experimental results on the effect of longitudinal ribs on the antitorque moment for Couette-Taylor flow between two rotating cylinders are presented. The tangential Reynolds number in the experiments was varied by varying the cylinder speed and the working fluid viscosity (water-glycerin solution). The experiments covered laminar, transient and turbulent flow regimes (Re = 200 - 1·105). It is shown that the ribs have an amplifying effect on the drag torque and mechanical energy dissipation only in the region of small Reynolds numbers (Re < 2000) in the laminar regime and in the presence of Taylor vortices in the gap. The intensification effect can reach two and more times and is caused by intensive turbulence of the flow by longitudinal ribs. In the turbulent regime, the heat release intensification is not observed, which is confirmed by the data available in the literature.
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