Counter-Rotating Type Tidal Stream Power Unit Mounted on a Mono-pile

作     者：Yuta Usui Toshiaki Kanemoto Kohei Takaki Koju Hiraki 

作者机构：Graduate School of Engineering Kyushu Institute of Technology Kitakyushu 804-8550 Japan Faculty of Engineering Kyushu Institute of Technology Kitakyushu 804-8550 Japan 

出 版 物：《Journal of Energy and Power Engineering》 (能源与动力工程（美国大卫英文）)

年 卷 期：2014年第8卷第10期

页      面：1748-1755页

学科分类：081401[工学-岩土工程] 08[工学] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

主　　题：Tidal turbine tidal stream tandem propellers counter rotation generator armature pile. 

摘      要：The authors have invented a unique counter-rotating type tidal stream power unit, which is composed of tandem propellers and a double rotational armature type generator without a stator. The front and the rear propellers drive, as for an upstream type, the inner and the outer rotational armatures in the counter-rotating directions respectively, which keep the rotational torques counter-balanced between both propellers and armatures. This paper investigates experimentally the output and forces acting on a pile in a water channel, to get design materials of the mono-pile type tidal stream power unit. The output is maximal at the moderate rotational speed, as the same as a wind turbine. The force acting on the pile is affected by the drag, the Karman vortex and the dynamic balances of the tandem propellers, and has dominant frequencies due to not only the individual but also the interacting rotation of the front and the rear propellers.