| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow straightener and a water stream cone body with a built-in underwater power generator capable of improvement and reduction prevention of utilization efficiency of hydro-energy of the underwater power generator comprising the water stream cone body.SOLUTION: The water stream cone body 1 formed in a conical pipe shape houses therein a flow straightener 2 comprising a taper bar 2a with its diameter enlarged from the top end side toward the rear end side and a guide vane 2b elongating in the axial direction in the portion. The taper bar 2a comprises a taper bar diameter expanding part 20a, and a taper bar narrowed part 20b with the diameter of the outer surface 20c gradually reduced in a recessed arc-like shape from the portion to a rear end part 2d. The water stream cone body 1 having its diameter of a top end part 1c smaller than that of a rear end part 1d comprises a cone body diameter expanding part 10a and a cone body narrowed part 10b with the diameter reduced gradually from the portion to the rear end part 1d in an arc-like shape. An underwater power generator 11 having the same diameter therewith is mounted on the taper bar diameter expanding part 20a of the flow straightener 2. A propeller water turbine 9 is mounted on the top end portion of the underwater power generator 11. |
