| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for reducing airflow noise of a windmill, whereby a low noise type windmill is materialized by reducing airflow noise. <P>SOLUTION: Injection openings 30 to inject air are formed in the rear rim part 2a of the blade of the windmill 1 and/or in its vicinity. <P>COPYRIGHT: (C)2003,JPO |
