产生用于减少推进器噪音与振动的非对称伴流的涡流发生器

• Format: Patent
• Language: Chinese
• Published: 21.09.2018
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MARINE PROPULSION OR STEERING; PERFORMING OPERATIONS; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

本发明涉及种产生用于减少推进器噪音与振动的非对称伴流的涡流发生器，其能够控制流入安装在船舶的推进器(propeller)的流动以减少船舶推进器叶片面上发生的空泡(cavitation)而得以减少推进器的噪音与振动，为了解决现有技术的翼状附属物或控流鳍(flow control fin)的下列问题，亦即，设置在推进器前方的船体表面，为了控制流入推进器的流动而使得翼状结构物具备和来流之间的攻角并且凭借流体力量控制流速及流动方向地构成而只能在成为大型结构物时才能发挥出效果，而且，其虽然设置在推进器前方的船体表面凭借着让水平(tangential)方向的速度变化而凭借着预旋(Pre-swirl)效果提升推进器效率，却也存在着因为空泡增加而导致推进器噪音与振动增加的副作用，本发明的该产生用于减少推进器噪音与振动的非对称伴流的涡流发生器通过产生非对称涡流使得轴(axial)方向速度变化而减少流入叶片面的攻角，因此形成了让最能发生空泡的螺旋桨面第象限或第二象限侧的流动特别加快的非对称式伴流(wake)分布而得以最大程度地减少空泡噪音的发生。 The present invention relates to a vortex generator that generates an asymmetric wake for reducing propeller noise and vibration, the vortex generator being capable of reducing propeller noise and vibration by reducing cavitation on blade surfaces of the propeller in a vessel by controlling a flow moving to the propeller in the vessel. The present invention provides a vortex generator that generates asymmetric wakes for reducing propeller noise and vibration, the vortex generator being cable of minimizing cavitation noise by generating asymmetric