ANSYS Fluent software verification while studying aerodynamic characteristics of Savonius rotor

Аuthors

Glazkov V. S.^*, Ignatkin Y. M.^**

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: gvs29@ya.ru
**e-mail: k102@mai.ru; ignatkinym@mai.ru

Abstract

The paper presents the results of calculations of the aerodynamic characteristics of the Savonius S-type rotor, performed by numerical modeling of CFD hydrodynamic processes in the ANSYS Fluent software package in the two-dimensional formulation of the problem. The calculation area extends over a distance 7D behind the rotor; 3D – in front of the rotor and has a width of 6D, where D is the diameter of the wind wheel. For the calculation area, a grid of a combined type was constructed and division into calculation zones was made. On the boundary between the rotating and static computed zones, the sliding condition of the grids was applied. To take into account the effect of disruptive phenomena on the surfaces of the aerodynamic profiles of the rotor, a prismatic grid of the boundary layer was constructed with different cell heights. The 6DOF solver is used, which makes it possible to simulate the problem of untwisting the wind wheel from the resting state to reaching the working rpm under the action of an incident flow of different speeds and to trace the change in aerodynamic characteristics during this unsteady regime. The dependences of the instantaneous values of the torque coefficient on the rotor rotation angle are obtained. The dependences of the averages of the power factor of the wind wheel for the different values of speed are obtained. Comparison of the obtained results with the experimental data at different operating conditions of the windmill showed satisfactory agreement. The results of calculations of the lateral force resulting from the rotation of the S-type wind wheel in the range of the velocities of the oncoming stream V = 6..7.5 m / s, squeezed by the manifestation of the Magnus effect, are obtained. These calculation results are necessary for further strength analysis in the case of installing a windmill on the supporting structures of slow-moving aircraft as an emergency source of energy.

Keywords:

Savonius rotor, CFD method, aerodynamic characteristics, verification

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