A wind turbine blade device includes a rotating unit including a blade module concentrically connected to a rotating shaft thereof and having a plurality of radially curved channels each having inlet and outlet ends. The inlet and outlet ends of the radially curved channels are configured to respectively permit flow of the flow body into and out thereof. An outer tube includes a tube body surrounding the rotating unit, and a plurality of rib plates provided in the tube body. The outlet end of each radially curved channel corresponds to one of the rib plates, and each radially curved channel forms an included angle with a corresponding rib plate such that the flow body flowing out of the outlet end can impact upon the corresponding rib plate.

A vane body of a guide vane includes a leading edge, and a trailing edge which is located closer to a runner than the leading edge, when located radially outside the runner. A projection extending in a direction from the trailing edge toward the leading edge is provided on an internal-diameter side blade face of the vane body, at least in any one of one side area of the internal-diameter side blade face and the other side area thereof in an axial direction of a guide vane rotation shaft, the internal-diameter side blade face being disposed on a side of the runner. The projection has a projection rear end of an arcuate shape, which projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft.

This invention aims to provide the composition of inlet so that the strong output may be provided by rotating with the state of high efficiency as the water falling energy and the flow pressure are simultaneously provided to the impeller and to provide impeller assembly for hydroelectric power generation device maximizing the output efficiency by improving the composition of impeller positively. Namely, this invention inserts the impeller in the main body of cylinder shape that the closed inner space is formed by the cover member, the driving shaft shall be supported in the bearing coupled to the cover member, the impeller installed in the inner space shall be driven by forming the inlet and the outlet in the main body in the impeller assembly for a hydroelectric power generation device; the abovementioned inlet, the fluid like the involute curve shall be supplied from the 12 o'clock direction to the 4 o'clock direction of the main body, the outlet is formed from 6 o'clock direction to 8 o'clock direction, the abovementioned impeller forms the plural fluid tanks opened toward the inner surface of the main body, the moment of rotation of the impeller shall be increased by forming the abovementioned fluid tank in the closed pressuring part is formed in the direction of 4 o'clock direction to 6 o'clock direction.

A vortex generator apparatus including a fluid intake duct, a fluid tank including: a first fluid inlet port, a second fluid inlet port, and a fluid outlet port. A turbine is provided outside of the fluid tank in fluid communication with the fluid outlet port.

A gravitational vortex water turbine assembly is described wherein the water turbine is disposed below the bottom of the basin in which the vortex is induced. Preferably, the basin comprises a spiral-shaped side wall and the rotor blades of the turbine rotor are dimensioned such that they absorb the tangential, axial and radial component of the water flow of the vortex.

A double-flow type volute casing having a structure for changing the direction of flow in a turbine inlet is proposed. The volute casing includes a partition plate for partitioning a volute defined in the casing into an inner flow channel and an outer flow channel, provided so as to surround a turbine, a plurality of flow-rate adjustment holes formed in the partition plate so as to be arranged at a gradually decreasing interval such that a high-pressure fluid flowing in the outer flow channel is introduced into the inner flow channel and the fluid flowing in the inner flow channel is directed perpendicularly to the turbine blades, in order to minimize the amount of energy that is lost and to reduce imbalanced variation of torque applied to the turbine blades.

A vortex generator apparatus including a fluid intake duct, a fluid tank including: a first fluid inlet port, a second fluid inlet port, and a fluid outlet port. A turbine is provided outside of the fluid tank in fluid communication with the fluid outlet port.

A vane body of a guide vane includes a leading edge, and a trailing edge which is located closer to a runner than the leading edge, when located radially outside the runner. A projection extending in a direction from the trailing edge toward the leading edge is provided on an internal-diameter side blade face of the vane body, at least in any one of one side area of the internal-diameter side blade face and the other side area thereof in an axial direction of a guide vane rotation shaft, the internal-diameter side blade face being disposed on a side of the runner. The projection has a projection rear end of an arcuate shape, which projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft.

Disclosed is a Francis turbine, and more particularly a double-flow type volute casing having a structure for changing the direction of flow in a turbine inlet, wherein a partition plate for partitioning a volute defined in the casing into an inner flow channel and an outer flow channel is provided so as to surround a turbine, the ratio in sectional area of the inner flow channel to the outer flow channel in a volute inlet, into which a fluid is introduced, is 4:6, a plurality of flow-rate adjustment holes is formed in the partition plate so as to be arranged at a gradually decreasing interval such that a high-pressure fluid flowing in the outer flow channel is introduced into the inner flow channel and the fluid flowing in the inner flow channel is directed perpendicularly to the turbine blades, in order to minimize the amount of energy that is lost and to reduce imbalanced variation of torque applied to the turbine blades, whereby it is possible to prevent the generation of vibration and to obtain high rotational force based on the guarantee of stable output, and therefore it is possible to improve the performance of a hydraulic turbine and to increase the lifespan of the hydraulic turbine through the stable driving thereof.

A Francis turbine runner including a shortened band length and a shortened blade length combined with a reversed runner blade leading edge having a junction of the leading edge with the band forerunning a junction of the leading edge with the crown in the rotational direction, and a bandless runner including a shortened periphery length and a shortened blade length combined with a reversed runner blade leading edge having a corner of the leading edge at the outer periphery of the runner that is in advance of where the leading edge joins the crown in the rotational direction. Additional feature includes an inverted trailing edge curvature design on the runner blade that further shortens the blade length.