The invention relates to a ship double-tail-fin tail end anti-drag twisted inclined strut and a design method thereof. The design method comprises the steps that the thickness and area of the cross section of the inclined strut are determined; determining the geometrical shape of the cross section of the inclined strut; determining a side oblique angle between the central axis of the inclined strut and the central line of the tail fin; determining a trim angle between the central axis of the inclined strut and the central line of the tail shaft; inclined strut front incoming flow streamline angles at different water line heights serve as inclined strut cross section center line angles at different water line heights, and the outer contour of the inclined strut is in smooth transition; and screening a distorted inclined strut scheme with the minimum resistance by adopting fluid mechanics software. According to the ship double-tail-fin tail end resistance-reducing twisted inclined strut, the attack angle between the center line of the cross section of the inclined strut at different water line heights and incoming flow at each water line height is close to zero while the structural strength of the inclined strut and the tail fin vibration reduction requirement are guaranteed, the interference effect of the inclined strut on a surrounding flow field can be reduced to the maximum extent, and the service life of the inclined strut is prolonged. And a better self-resistance-reducing effect is achieved.
本发明涉及一种舰船双尾鳍末端减阻扭曲斜撑及其设计方法,包括:确定斜撑横截面厚度、面积;确定斜撑横截面几何形状;确定斜撑中轴线与尾鳍中心线之间的侧斜角;确定斜撑中轴线与尾轴中心线之间的纵倾角;将不同水线高度处的斜撑前来流流线角作为不同水线高度处的斜撑横截面中心线角,并将斜撑外轮廓光滑过渡;采用流体力学软件筛选阻力最小的扭曲斜撑方案。本发明设计的舰船双尾鳍末端减阻扭曲斜撑,在确保斜撑自身结构强度和尾鳍减振需求的同时,不同水线高度处的斜撑横截面中心线与各水线高度处来流之间的攻角均接近于零,可最大程度降低斜撑对周围流场的干扰作用,具有更好的自身减阻效果。
Ship double-tail-fin tail end anti-drag twisted inclined strut and design method thereof
一种舰船双尾鳍末端减阻扭曲斜撑及其设计方法
2023-04-25
Patent
Electronic Resource
Chinese
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
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