WATER TURBINE AND PIPE

摘要

PROBLEM TO BE SOLVED: To provide a water turbine that can reduce friction loss and effectively use water energy.SOLUTION: A water turbine 1 according to an embodiment comprises: a water turbine body 2; running water surfaces 20 provided in the water turbine body 2 and defining a flow passage 21 of water; and coating layers 30 provided on the running water surfaces 20 and made of water-repellent paint or hydrophilic paint.