風力エネルギー
Online ISSN : 1884-457X
Print ISSN : 0387-6217
最新号
選択された号の論文の37件中1~37を表示しています
巻頭言
特集1 NEDOプロジェクト「洋上風況観測システム実証研究(洋上風況マップ)」の紹介
特集2 風力発電設備に関する認証・規格類
寄稿
連載 「わがマチわがフルサト」 ー地域創生、文化、名所、新エネ・再生エネ、風力発電
会議参加・報告記
技術情報・最新情報
海外風力エネルギー学協会からの情報
話しの広場
論文
  • 渡邉 康一, 松本 恵実, Nwe Thandar, 烏谷 隆, 大屋 裕二
    2017 年 41 巻 1 号 p. A_1-A_8
    発行日: 2017年
    公開日: 2018/07/11
    ジャーナル フリー
    The effective shape of surrounding structures was investigated to improve the power output of vertical axis wind turbines through wind tunnel experiments. A VAWT equipped with a pair of vertical flat plates in the upstream demonstrated power augmentation by a factor of 2.4 compared to the VAWT without plates. The pair of plates could accelerate the gap flow in the downstream wind, and also could reduce a drag force to a blade of a VAWT toward upstream. We proposed a recommended shape of the structures which consist of flat panels in the upstream.
  • 原 豊, 斎藤 栄徳, 塩谷 啓介, 塩崎 明, 西小野 寛明, 奥谷 将裕, 三嶋 一生, 川端 俊亮, 吉田 茂雄
    2017 年 41 巻 1 号 p. A_9-A_16
    発行日: 2017年
    公開日: 2018/07/11
    ジャーナル フリー
    A new mechanical and passive over-speed control system (OCS) for vertical axis wind turbine (VAWT) has been proposed aiming at the safety improvement and the cost reduction. The OCS slants the blades to make them work as an air brake by using the centrifugal force when the rotor rotational speed increases. When the speed decreases, the system restores the blades to original state by the force of springs. The OCS has a function to synchronize the movements of blades each other. The performance of an aluminum circular-bladed butterfly wind turbine (ACBBWT), which is equipped with the OCS and whose rotor diameter is 3.16m, is predicted by the blade element momentum (BEM) theory and is compared with the experimental results under the condition of no load. The continuous twist action of the blades was observed in the experiments. As the results, the over-speed control under the high wind speed conditions was verified and the validity of theoretical prediction was shown.
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