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A fluid power generation device is configured to provide electric power generation using fluid action, and comprises multiple power generation mechanisms. Each power generation mechanism comprises: a casing that allows a fluid to pass through its internal space; and a power generation unit arranged

A fluid power generation device is configured to provide electric power generation using fluid action, and comprises multiple power generation mechanisms. Each power generation mechanism comprises: a casing that allows a fluid to pass through its internal space; and a power generation unit arranged within the casing, and configured to perform electric power generation using the fluid action. The casing is configured to generate vortexes in the vicinity of its fluid outlet. The multiple casings are arranged with spaces as intervals between them. Each casing generates vortexes in the vicinity of its fluid outlet. Furthermore, such an arrangement provides an interaction effect between the vortexes generated in the vicinity of the fluid outlets of the multipole casings arranged with the spaces as intervals between them. This provides a synergistic effect for accelerating the inner flow based on the interaction between the power generation mechanisms.

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1. A fluid power generation method employed in a fluid power generation device configured to perform electric power generation using a fluid action, wherein the fluid power generation device comprises a plurality of power generation mechanisms, wherein each of the power generation mechanisms compris

1. A fluid power generation method employed in a fluid power generation device configured to perform electric power generation using a fluid action, wherein the fluid power generation device comprises a plurality of power generation mechanisms, wherein each of the power generation mechanisms comprises: a casing configured to allow a fluid to pass through an interior thereof; anda power generation unit arranged within the casing, and configured to generate electric power using the fluid action,wherein the casing is configured to have a structure for generating vortexes in the vicinity of a fluid outlet,wherein the plurality of casings are arranged so as to define a space between each adjacent pair thereof,and wherein the fluid power generation method comprises: generating, by means of each casing, the vortexes in the vicinity of the fluid outlet; andcontrolling the vortex so as to provide an interaction effect between the vortexes thus generated in the vicinity of the fluid outlets of the plurality of casings arranged with the spaces as intervals between them. 2. The fluid power generation method according to claim 1, wherein the fluid power generation device comprises at least a first power generation mechanism, a second power generation mechanism, and a third power generation mechanism, wherein the first power generation mechanism, the second power generation mechanism, and the third power generation mechanism are arranged in a layout other than a linear array layout,and wherein the space defined between the casing of the first power generation mechanism and the casing of the third power generation mechanism is larger than the space defined between the casing of the first power generation mechanism and the casing of the second power generation mechanism, and is larger than the space defined between the casing of the second power generation mechanism and the casing of the third power generation mechanism. 3. The fluid power generation method according to claim 1, wherein the fluid power generation device comprises at least a first power generation mechanism, a second power generation mechanism, and a third power generation mechanism, wherein the first power generation mechanism, the second power generation mechanism, and the third power generation mechanism are sequentially arranged in a linear array layout, so as to provide a vortex interaction effect between the first power generation mechanism and the second power generation mechanism, and between the second power generation mechanism and the third power generation mechanism, without involving such a vortex interaction effect between the first power generation mechanism and the third power generation mechanism. 4. The fluid power generation method according to claim 1, wherein the fluid power generation device comprises at least a first power generation mechanism, a second power generation mechanism, and a third power generation mechanism, and wherein a space between the casings of the first power generation mechanism and the second power generation mechanism, a space between the casings of the second power generation mechanism and the third power generation mechanism, and a space between the casings of the first power generation mechanism and the third power generation mechanism are each defined to have the same size. 5. The fluid power generation method according to claim 1, wherein a part of or otherwise all of the plurality of power generation mechanisms are arranged such that they can be rotated around a predetermined axis defined along a vertical direction, and wherein the fluid power generation device comprises a control unit configured to control a pair of the power generation mechanisms arranged such that they face each other across the predetermined axis so as to provide a difference in a load applied to the power generation unit between the pair of power generation mechanisms. 6. The fluid power generation method according to claim 1, wherein the casing comprises a flange portion configured to generate vortexes in the vicinity of the fluid outlet. 7. The fluid power generation method according to claim 1, wherein the orientations of the inner flows of the fluid that flows through the internal spaces of the respective casings are approximately in parallel with each other. 8. The fluid power generation method according to claim 1, wherein the casing is configured to generate vortexes in the vicinity of a fluid outlet thereof, so as to accelerate an inner flow speed of the fluid that flows through the casing, and wherein, in the acceleration of the inner flow speed of the fluid, the vortexes thus generated in the vicinity of the fluid outlet of each casing are controlled so as to provide an interaction effect between the plurality of casings arranged with the spaces as intervals between them, so as to raise the inner flow speed of the fluid that flows through each casing as compared with the inner flow speed provided without such an interaction effect. 9. The fluid power generation method according to claim 1, wherein the power generation unit comprises a rotor configured to rotate around a rotational axis and/or a rotor comprising an outer rotor generator comprising a coil fixed to a fixed shaft, and a magnet arranged on an outer circumferential side of the coil, and configured to rotate according to rotation of blades, and wherein the power generation unit further comprises a plurality of spokes each mounted between the casing and a front end or otherwise a rear end of the fixed shaft along an axial direction of the fixed shaft. 10. The fluid power generation method according to claim 1, wherein the fluid power generation device further comprises a casing member configured to surround the plurality of power generation mechanisms. 11. The fluid power generation method according to claim 1, wherein the space is defined with a size that is included within a range comprising 0.05 times to 1.5 times a maximum outer size of the casing. 12. A fluid power generation device configured to provide electric power generation using a fluid action, comprising a plurality of power generation mechanisms, wherein each of the power generation mechanisms comprises: a casing that allows a fluid to pass through an internal space thereof; anda power generation unit arranged within the casing, and configured to perform electric power generation using the fluid action,wherein the casing is configured to have a shape for generating vortexes in the vicinity of a fluid outlet thereof,wherein the plurality of casings are arranged with spaces as intervals between them,and wherein the vortexes generated in the vicinity of the fluid outlet of each casing are controlled so as to provide an interaction effect between the plurality of casings arranged with the spaces as intervals between them. 13. The fluid power generation device according to claim 12, wherein the space is defined with a size that is included within a range comprising 0.05 times to 1.5 times a maximum outer size of the casing.