计及船体姿态变化的水池阻塞效应数值研究

发布时间：2018-09-06 14:34

【摘要】：在水池进行船模试验,特别在水池尺度较小、船模尺度相对较大时,必然遇到阻塞效应问题,必须予以修正。本文以KCS船为对象,计及自由度,计算无限域及1.5%、1.8%、2.2%、3.0%阻塞比的船模阻力以及船体的升沉和纵摇,另外计算了船宽、池宽比为0.16、0.18、0.21的船模阻力,分析了船宽池宽比对阻塞效应的影响。随阻塞比的增大,船模总阻力变化更加明显;通过不同公式的修正结果对比,建议在阻塞比小于1.5%的拖曳水池进行阻力试验,且当船阻塞比小于1.8%时,推荐斯科特公式和基于平均横剖面积的平均流修正公式作为主要的修正手段,船宽、池宽的比值也是阻塞效应修正不可忽略的因素。
[Abstract]:When the ship model test is carried out in the pool, especially when the scale of the tank is small and the ship model scale is relatively large, the blocking effect is inevitable and must be corrected. In this paper, taking the KCS ship as an object, taking into account the degree of freedom, the ship model resistance and the heave and pitching of the ship with an infinite domain and 1.8g / 1.5 ratio of 3.0% blocking ratio are calculated, and the ship model resistance of the ship with the width of the ship and the ratio of the width of the ship to the pool of 0.180.21 is calculated, and the influence of the ratio of the width to the width of the ship on the blocking effect is analyzed. With the increase of the blocking ratio, the change of the total resistance of the ship model is more obvious. By comparing the revised results of different formulas, it is suggested that the drag test should be carried out in a towing tank with a blocking ratio of less than 1.5%, and when the blocking ratio is less than 1.8, The Scott formula and the average flow correction formula based on the average cross-section product are recommended as the main means of correction. The ratio of ship width and pool width is also a factor which can not be ignored in the correction of blocking effect.
【作者单位】：哈尔滨工程大学船舶工程学院;
【基金】：国家自然科学基金项目(41176074;51209048,51379043,51409063) 工信部高技术船舶科研项目(G014613002) 哈尔滨工程大学青年骨干教师支持计划(HEUCFQ1408)
【分类号】：U661.71

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