| 摘要 |
The steering nozzle (122) of an air flow has a first flow aperture (124) and a directing organ (130) for steering the air flow to be led through the first flow aperture to the first flow direction (F). The steering nozzle further has at least one second flow aperture (140), which is arranged to steer the air flow to be led through it to the second flow direction (S) intersecting with the first flow direction (F). The intersecting air flow flowing through the second flow apertures turns the air flow flowing through the first flow aperture. The cross-sectional area of the first flow aperture is preferably substantially bigger than the cross-sectional area of the second flow apertures. The second flow apertures can be arranged as a group of apertures in the vicinity of the first flow aperture so that only part of the second flow apertures is arranged to steer the air flow to be led through them to the second flow direction intersecting with the first flow direction. In connection with the second flow apertures there can be a directing instrument, such as a steering pipe for directing the air flow to be led through the second flow apertures. |
