平头方尾运输船舶开槽减阻研究

发布时间：2018-04-01 01:34

本文选题：运输船舶　切入点：减阻　出处：《船舶工程》2016年06期

【摘要】：传统的平头方尾型运输船舶具有载重大、吃水浅的优点,但航行阻力大,航速低。文章针对该船型开展了开槽减阻的研究,通过在船底开设纵向槽道对艏部高压区进行引流减阻来实现该船型高航速运输的要求。船体流场及阻力采用RANS方法进行数值模拟,并计及航行姿态的变化。通过改变槽道长度、宽度以及槽道顶板的倾斜角度,研究了减阻效果与槽道几何特征的关系。研究表明,船底槽道的引流量是影响减阻效果的主要因素,当采用纵向贯穿的槽道,且槽道顶板倾斜角为-2°时,可使原船在30 kn下的减阻率达到23%以上。
[Abstract]:The traditional flat-headed square-tail ship has the advantages of high load and shallow draught, but the navigation resistance is large and the speed is low.In this paper, the research of slotted drag reduction is carried out for this ship form, and the requirement of high speed transportation of the ship form is realized by opening a longitudinal groove in the bottom of the ship to reduce the draining resistance of the bow high pressure area.The ship flow field and resistance are simulated by RANS method, and the change of navigation attitude is taken into account.By changing the length and width of the groove and the inclined angle of the roof of the groove, the relationship between the drag reduction effect and the geometric characteristics of the groove is studied.The research shows that the diversion flow of the bottom groove is the main factor affecting the drag reduction effect. When the longitudinal channel is adopted, and the slope angle of the top of the groove is 2 掳, the drag reduction rate of the original ship can reach more than 23% at 30 kn.
【作者单位】：武汉理工大学高性能舰船技术教育部重点实验室;武汉理工大学交通学院船舶海洋与结构工程系;
【分类号】：U661.311

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