简介: |
讲演者简介：T. Kanemoto教授是国际上著名的流体机械专家，在可再生能源（海洋能、风能、小水电）利用、流体非稳定现象及机理等研究领域取得了卓越的学术成就。Kanemoto教授1985年毕业于东京都立大学，获工学博士学位；1996年任（日本）九州工业大学教授。Kanemoto教授曾两次出任日本透平机械協会副理事长。现任日本佐贺大学海洋能研究所首席研究员。目前主要学术兼职：日本小水电事业评议会主席，（日本）神奈川大学客座教授、（日本）九州工业大学荣誉教授、华南理工大学访问教授。
报告摘要
A unique idea "counter-rotating type turbo-unit" came into Kyushu Institute of Technology on January 25, 1998. In the unit, tandem impellers/runners connect directly to inner and outer armatures of a peculiar motor/generator. Both impeller speeds are automatically adjusted in response to the pumping discharge, while the rotational torques between both impellers/armatures are counter-balanced. That is, the angular momentum change through the rear impeller must coincide with that through the front impeller. Such adjustments contribute to suppress not only the unstable operation at the lower discharge but also the cavitation at the higher discharge, while the relative rotational speed is kept constant in an induction motor. The relative rotational speed between the tandem runners, in the generating mode, is higher than the traditional type single runner/armature speed. Such power units have promising advantages, for instance, (i) the induced voltage is higher at the same diameter, (ii) the diameter of the armature can be reduced at the same individual rotational speed, and then (iii) the rotational moments hardly act on the mounting bed. The counter-rotation, whose advantages were verified experimentally in the pumping and the generating modes, has been also applied to wind power units, tidal power units. These units are on stand-to work in the markets. |
