Rotating blade bodies for turbines using magnus effect with rotation axis of turbine at right angle to direction of fluid

Abstract

The present invention relates to a rotating body (10) for turbines using the Magnus effect with an axis of rotation of the turbine parallel to the direction of the working fluid, wherein it is obtained by an ovoid of construction of Rankine-Fuhrman, arranged with major axis (L RL ) parallel to the axis of rotation of the rotating body (10), said major axis (L RL ) of the ovoid being equal to 10 times the minor axis (D RL ), of the same ovoid, the diameter (D) of said rotating body (10) being variable along the axis of rotation of said rotating body (10) up to a maximum value comprised between 1/5 and 1/6 of the length (L) of said rotating body (10), said ovoid of construction of Rankine-Fuhrmann being divided into four sectors obtained dividing the major axis (L RF ) of the same ovoid into four segments (1, 2, 3, 4) having the same length, the profile of said rotating body being realised, respectively - following the profile of the second and third sectors into which the ovoid of construction of Rankine-Fuhrmann was divided, i.e. the sectors of the ovoid of Rankine-Fuhrmann corresponding to the second (2) and third (3) segments into which the major axis (L RF ) of the ovoid was divided, - following the profile obtained through the combined transposition of the third sector to the second sector into which the ovoid of construction of Rankine-Fuhrmann was divided, so to form two opposing trapezoids, welded along the minor base, or - following the profile obtained through the combined transposition of the fourth sector, i.e. the sector of the ovoid of construction corresponding to the fourth segment (4) into which the major axis (L RF ) of the ovoid was divided, to the first sector, i.e. the sector of the ovoid of construction corresponding to the first segment (1) into which said major axis (L RF ) of the ovoid was divided, so to form an hourglass, wherein the two sectors are connected, at the respective points of maximum curvature, by means of sections of prolated spheroid, i.e. with surfaces of quadrics of rotation with one flap.

Description

technical field [0001] The present invention relates to a rotating blade body for a turbomachine utilizing the Magnus effect, the axis of rotation of which is at right angles to the direction of a working fluid. [0002] More specifically, the invention concerns the definition of construction techniques for rotating bodies installed in hydraulic radial turbines operating according to a dynamic effect known as the Magnus effect and excited with respect to their Rotational movement of the longitudinal axis. Background technique [0003] In this context, the expression radial turbine refers to a turbine whose axis of rotation is at right angles to the direction of the working fluid. [0004] As is well known, there is a correlation between the rotation of a rotating cylinder with respect to its longitudinal axis and the flow of fluid impinging on said cylinder in a direction perpendicular to said longitudinal axis. This correlation was first described by Magnus in 1852, for w...

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Problems solved by technology

[0025] However, this important contribution has never been taken into account in the machines proposed so far employing the Magnus effect, and as a result these machines are not optimally able to exploit the Magnus effect, i.e., from a different point of view , the research and design of these machines, especially with reference to the shape of the rotating body, has not been optimized with respect to the contribution of the Earth's rotation

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