| 摘要 |
<p>The device (3) has an axial supported, freely movable impeller (5) for measuring wind speed, where the impeller is arranged in tubular passage channels (4, 11). An inlet cross section of the tubular passage channels is partly covered. The passage channels are partially covered at a inlet side and a rear side, where 35 percent of cross section of the channels is covered with respect to a cross section area.</p> |
