The gyromili wind turbine which is vert 童 ca [ −axis llft type was manufactured , by changing the diameter of a turbine impeller , solidity was changed and the pe formanee test was done. NACAOO12 ・ was used and it was considered as two −sheet wings . Chord length: C = 47 mm , Wingspan : L = 200mm , Solidityσ was set as O」5, 0. 225, 0. 3three kinds by changing the diarneter of windmill with 200mm , 133mm , 100mm , Moreover, the wings attachment angle theta was set up by 5 − degree unit from O degree to 30 degrees , EPP ( Expanded Polypropy 且 ene)and a carbon rod with a light weight and intensity are used fbr the raw material of a wind turbine. The result showed that performance improved as the diameter became large . It tumed out that there are also likeiy to be an impe】 ler diameter and Reynolds number by mak 正 ng perf ( )rmance into a decide parameteL Key 躍 rords :wind 加 rbine , vertica1 −axis lift type, solidity
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