海洋污损对螺旋桨叶切面性能影响的数值模拟

发布时间：2018-01-04 20:26

  本文关键词：海洋污损对螺旋桨叶切面性能影响的数值模拟　出处：《中国舰船研究》2016年03期 　论文类型：期刊论文

  更多相关文章： 海洋污损 叶切面 升阻力 SST k-ω湍流模型

【摘要】：通常情况下,舰艇螺旋桨桨叶表面为抛光金属材质,没有涂装防污涂层,使得桨叶易受到海洋污损生物的附着和侵蚀,然而污损对螺旋桨性能的影响研究较少。采用CFD方法对污损螺旋桨叶切面流场分布进行数值模拟,在污损生物群落中选取藤壶作为污损对象,并在几何层面上进行直接建模。计算结果表明,污损使得叶切面边界层分离更早、分离区域更大,进而使得叶切面升阻比显著降低(最大降低了近90%),从而导致螺旋桨推进效率大幅降低;当藤壶高度超过一定阈值后,藤壶的继续生长对叶切面升阻力的影响变得较小。
[Abstract]:Usually, the surface of ship propeller blade is a polished metal material, without antifouling coating, which makes the propeller blade vulnerable to the adhesion and erosion of marine fouling organisms. However, the influence of fouling on propeller performance is less studied. The CFD method is used to simulate the flow field of the impeller blade, and the barnacles are selected as the fouling object in the fouling biota. The results show that the blade blade boundary layer is separated earlier and the separation area is larger, and the rise-to-drag ratio of the blade surface is significantly reduced (the maximum reduction is nearly 90%). As a result, the propeller propulsion efficiency is greatly reduced. When the barnacle height exceeds a certain threshold, the effect of the continued growth of barnacles on the resistance of leaf cut surface becomes smaller.
【作者单位】： 海军工程大学舰船工程系;
【基金】：海军工程大学自然科学基金资助项目(HGDQNJJ13038)
【分类号】：U664.33
【正文快照】： 0引言在海洋水生环境中附着和生长于物体表面的微生物、植物和动物称之为海洋污损(简称污损)[1]。当一艘舰艇下水后污损便开始在舰艇上附着生长,在舰艇进行清洗和重新涂装之前污损将持续地生长积累。舰艇的污损程度取决于舰艇在海上的时间、航行水域的温度和盐度以及防污漆的，

本文编号：1379971