WO2009018666A1 – Transverse-axis Turbine With Twisted Foils – Google Patents

// Muletas _ Crutches _ Crosses // Imarchi Photography (http://www.imarchi.com) // #muletas.. Kane, discloses a vertical-axis wind turbine having multiple generally vertically extending blades arrayed about its periphery and having a rounded cap. 900, reducing its efficiency. Perpendicular-axis turbines are subject to the Magnus effect (also at times referred to as the Flettner effect), whereby an object’s rotation affects its path through a fluid, or if the object is in a fixed position or moving but mounted in such a way that its path cannot be affected by a fluid flowing past it, the flowpath of the fluid is affected. Figure 2 shows a solid-foil, helical, double-taper VAWT 62 having a planar base 61. Figure 3 shows the foils (i.e. As a portion of the flow along the foils of a tapered turbine (as distinct from the general flow as affected by the Magnus effect), is from the base of the turbine (i.e.

The chord length at the mount end is roughly 85% of the maximum chord length. As compared to conventional foil-to- base connections, in which the foil and base merely meet at roughly 90°, a quasi-conical base is strong and reduces drag by reducing the overall surface over which the relevant fluid flows (referred to at times as “wetted surface”). It has been found that turbines of the type generally described herein may usefully function with the fluid flow at an angle other than roughly 90° to the turbine’s axis of rotation. Thus the angle between adjacent chord/radius lines indicates the twist between adjacent chord/radius lines and, cumulatively, the twist for the illustrated foil.

Dolor Sordo Significado

Figure 40 is a foil-section view of a section at 30° of twist from the foil-section of figure 39 and in the vicinity of the non-mount end. If the turbine is helical, the twist can be specified by showing (by way of drawings or tables) the relative angles between the chord/radiuses at selected vertical locations (discussed further below). As can be seen in Figures 33 to 40, the relative locations and sizes of the outer variable convex section 1120, intermediate variable concave section 1122 and inner variable convex section 1124 are not constant along the span of the foil.

Thus, the greatest dimension of the inner convex section as measured from a chord between the axis of rotation of the turbine and the outer edge of the foil is at a location normal to a location on the chord within about 12% of the chord length of the axis of rotation. An upper-case-letter reference character in each drawing (for example, “Q” in Figure 9) is associated with the radius of the foil section in the immediate vicinity of the outer edge. The axis (center) of rotation of the relevant turbine is indicated on each drawing.

Dolores Musculares Y Fiebre

1982 to Mason, discloses a vertical-axis wind turbine, having blades pivotally mounted to enable them to swing out to catch wind, and to swing in to feather to reduce drag, as required during each rotation of the turbine. VAWT 66. Figure 5 shows the foil (i.e. However, the canting and flow direction need not be perfectly aligned and the canting is understood to at least not have a detrimental effect on performance, as compared to a turbine oriented to be perpendicular to all general possible flow directions, through about 180° of flow directions (i.e. VAWT 72. Figure 8 shows the foils (i.e.

Dolores Musculares Remedios

Figure 17 is a perspective view of the quasi-conical base of a solid- foil VAWT, with the foil removed. Dolor de espalda cuello hombros y brazos . FOR MANUFACTURING SAME, issued 6 August 2002 to Jaakola, discloses a helical Savonius-type turbine with a foil design utilizing a planar material. US Patent No. 3,941 ,504, WIND POWERED ROTATING DEVICE, issued 2 March 1976 to Snarbach, discloses a vertical-axis wind turbine having three generally helical foils wherein the bottoms of the foils are spaced apart and the foils are twisted and configures such that the leading edges of the foils all meet at the tops of the foils. Unlike the double-curved foil sections, in the two-foil single-curve VAWT foil-section 300, the surface of the foil furthest from the chord/radius line does not have a concave section. The helical form, the foil section configurations described herein; the tapered configuration and the quasi-conical base, are all understood to contribute to the formation and persistence of a low- pressure lift area that migrates from the mount end toward the non-mount end on the surface of the foil as the turbine rotates.

Dolor Neuropático Pdf

In this specification and in the claims, terms indicating a wind- turbine or water-turbine embodiment should not be taken as restricting the invention described herein to only wind or water turbines; the invention is applicable to use with any flowing fluid. The rotor of a horizontal axis wind turbine must face either into or away from the direction of the wind and a yaw mechanism is required to rotate the rotor about the vertical axis of the tower to keep the rotor in proper alignment with the wind flow. Canting can also be used where the turbine mounting structure can reorient relative to the flow direction, for example, in the case of water turbines mounted on barges in tidal flows, the barges could be anchored so as to be free to self orient relative to the flow. Such double- tapered configurations may optimally be used in turbulent locations, such as may pertain close to the ground, in the case of wind turbines.

Dolor Muscular Piernas

Figure 9 shows a solid-foil double-curve VAWT foil-section 100 of an embodiment of the present invention. Figure 6 is a perspective view showing an exemplary solid-foil, non- helical, double-taper, VAWT embodiment of the present invention. Figures 13 and 14 are top-view schematic representations showing selected chord/radius lines of tapered helical VAWT embodiments of the present invention. Dolor muscular hombro y brazo . Figures 9, 10, 11 and 12 are foil-section views of different VAWT embodiments of the present invention. In one aspect, the present invention is a transverse-axis turbine, typically having a mount at only one end (in the case of a VAWT, at the bottom end of the turbine), wherein the profile of the turbine is generally tapered, in that in the vicinity of the end of the turbine opposite the mount end (referred to herein as the non-mount end) the chord length diminishes, such that at the top end the chord length is zero, near zero or at least is substantially less than the chord length at the mount end.

Figure 10 is a foil-section view of a two-foil VAWT embodiment of the present invention, having a double-curve foil section, the drawing indicating offset dimensions for the foil section, the offsets taken from a chord/radius line. Figures 25 and 26 show an exemplary solid-foil, helical, double- taper water turbine 900 suitable for use in the arrangements shown in Figures 22, 23 and 24. Figure 27 shows chord/radius lines of the water turbine 906 shown in Figures 25 and 26. The relative dimensions of the chord lengths at different distances from the end of the turbine furthest from the connection point of the flexible cable (and at different relative angles) are given in the following table. Although, general developments in wind turbine technology may have some application to water turbine technology, given the differences in fluid density and operational environments, there has not been significant overlap in recent wind and water turbine developments.

Fisioterapia Neurológica

Figure 28 shows a collapsible, helical, ram-air VAWT 1000. As shown in Figure 28, and with respect to some features in greater detail in Figures 29 and 30, the ram-air VAWT 1000 comprises a bottom plate 1002 mounted on a column 1004 and a top plate 1006. The ram-air foil 1008 comprises a plurality of battens 1010, with each batten 1010 slidably mounted to a shaft 1012 at a hole passing through the batten 1010. Relative rotational movement of the battens 1010 about the shaft 1012 is impeded; preferably, the shaft 1012 is splined and the holes in the battens 1010 are configured to mate with the splines. The sections above the section at which the lift area is established have greater rotational motive force than they would have without the migration of the lift area, resulting in a reasonably constant torque throughout each full rotation of a thus tapered foil.

Dolores Musculares Generalizados

Figure 14 shows selected chord/radius lines of a helical, double- taper, VAWT 600 embodiment of the present invention. Figure 8 is a perspective view showing an exemplary two-foil, non- helical, double-taper, VAWT embodiment of the present invention. Figure 3 is a perspective view showing an exemplary two-foil, helical, single-taper, VAWT embodiment of the present invention.

  1. Los brazos y la espalda deben estar en una posición que no cause dolor
  2. Contact us
  3. Linfadenitis axilar
  4. Controlar que funcionen sin problemas y que no presenten dificultad al abrirlas o cerrarlas
  5. Pregabalina ( Lyrica )
  6. El papel de los nervios simpáticos

Transverse-axis turbines of the present invention fall generally into the class of the so-called Savonius-type transverse-axis turbines. The radius of the fifth section 1110 is 100% of the maximum radius of the solid-foil helical non-constant-section turbine1100. Figures 33 to 40 show a solid-foil helical non-constant-section turbine 1100 embodiment of the present invention having a double-curve foil section. Fiebre y dolor muscular . Figure 5 is a perspective view showing an exemplary solid-foil, non- helical, single-taper, VAWT embodiment of the present invention. However, it will be apparent to those skilled in the art that wind turbine foils may be made in many different ways.