Toyota Jidosha Kabushiki Kaisha

Tokyo University of Agriculture and Technology

National University Corporation Tokyo University of Agriculture and Technology

Kaoru Iwamoto

Hirokazu Ito

Naoki Takeuchi

Tsuneo Tsutsui

The invention relates to a fluid transport pipe. A first unit channel in which a channel cross-sectional area continuously decreases toward a downstream side and a second unit channel in which a channel cross-sectional area continuously increases toward the downstream side are alternately combined. A ratio A (=L/{[Smax]-[Smin]}) is set within a range in which a drag reduction rate Rbecomes a positive value. The fluid transport pipe includes: a first opening formed in a channel wall of the first unit channel; a second opening formed in a channel wall of the second unit channel; and a bypass channel that allows by-passing of a flow from the first unit channel to the second unit channel through the openings.

Growing community of inventors

Fuchu, Japan

Kaoru Iwamoto