報告書番号

U03044

タイトル（和文）

着氷雪4導体および単導体送電線の定常・非定常空力特性に関する風洞実験

タイトル（英文）

A wind tunnel study on quasi - steady and unsteady forces of ice accreted four bundled and single conductor transmission lines

概要 （図表や脚注は「報告書全文」に掲載しております）

現実的なギャロッピングシミュレーションを行うためには，入力として，精度の高い空気力係数を用いる必要がある．しかし，既往の風洞実験によって得られた空気力係数については，試験体の断面寸法が不明確，多導体のデータが少ない，非定常空気力係数が少ない，といった問題がある．このため本検討では，断面寸法を明確に定義した着氷雪4導体および単導体の試験体を用い，3分力天秤実験および大振幅回転加振実験により，定常および非定常空気力係数を取得した．また，実験結果から，4導体と単導体，定常と非定常の間で，空力特性を比較した．

概要 （英文）

To perform realistic transmission line galloping simulations, it is very important to use accurate aerodynamic coefficients of ice accreted transmission lines. The coefficients can be obtained by wind tunnel tests, however, accreted ice profiles were not clearly defined in many of past tests, and the coefficients ever obtained are small in variety, expressly for multi bundled conductors. So in this study, three-component balance tests and large amplitude rotational oscillation tests were conducted to take an accurate measurement of quasi - steady and unsteady aerodynamic coefficients of 4 - conductor bundled as well as single conductor section models with artificial accreted ice whose profiles were clearly defined. The measured coefficients were compared between bundled and single conductor, for the purpose of making conductor bundle effect on aerodynamic characteristics clear. And the relation between accreted ice profiles and aerodynamic characteristics were investigated.

報告者

キーワード