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噴石模型の落下試験の動画解析

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図 5 .平均水平風速 UV  図 6 .乱れ強さ Iz  2.4  風速プロフィール 噴石模型を落下させる際の,周囲の気流性状をドップラーライダー(三菱電機社製 DIABREZZA )と超音波風速計 (カイジョー製 SAT900 )を使用して観測した。ドップラーライダーは上空にレーザ光を照射して上空の風向風速を計 測する装置であり, 40m 以上の高度のデータが得られた。地面付近の風向風速は超音波風速計による観測値を用い てデータを補った。 図 5 ,図 6 に噴石模型( A1 , B2 , C2 )投下

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