Fluid power generation method and a fluid power generator

A fluid power generator for generating electric power by utilizing the action of a fluid, comprising a plurality of power generation mechanisms. Each power generation mechanism includes a casing through the inner fluid, and a power generation unit provided inside the casing to the generator by utilizing the action of the fluid. Casing is to form a vortex around the outlet of the fluid. A plurality of casings are disposed with a gap. Vortex around the outlet of the fluid is formed by each casing. Furthermore, the vortex formed around the outlet of the fluid a plurality of casings which are disposed with a gap interfere. This makes it possible to obtain a synergistic effect of the speed increasing effect of the internal flow by each power generation mechanism.