2024-03-29T09:44:23Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00003710
2022-12-15T03:36:49Z
423:424:425
453:454
Visualization and Image Analysis of Dynamic Stall Phenomenon for a Darrieus Wind Turbine
ダリウス風車における動的失速現象の可視化と画像解析に関する研究
ダリウス風車における動的失速現象の可視化と画像解析に関する研究
藤沢, 延行
44838
渋谷, 賢志
44839
高野, 剛
44840
Flow Measurements
Flow Visualization
Windmill
Dynamic Stall
Digital Image Processing
Wake
Fluid Machinery
The flow field around a Darrieus wind turbine is studied by flow visualization and PIV measurement in a rotating frame of reference to understand the unsteady nature of dynamic stall appearing at low tip-speed ratios. The qualitative nature of the dynamic stall observed by the flow visualization using dye injection technique is quantitatively reproduced in the instantaneous velocity distributions around the blade measured by PIV technique. These results indicate that two pairs of stall vortices are generated in one cycle of the turbine rotation and they grow in size as the tip-speed ratio decreases. The mechanism of the dynamic stall is found to be due to the flow separation over the suction side of the blade followed by the generation of in-flow motion from the pressure side to the suction side of the blade through the trailing edge.
journal article
日本機械学会
1999-10
application/pdf
日本機械学会論文集. B編
638
65
3374
3379
日本機械学会論文集. B編
AN00187441
03875016
https://niigata-u.repo.nii.ac.jp/record/3710/files/9_0060.pdf
jpn
http://ci.nii.ac.jp/naid/110002395646
日本機械学会
本文データは学会の許諾に基づくCiNiiからの複製である