The invention relates to a ship stern near-hull flow field adjusting method, which comprises the following steps of: 1, calculating a flow field near a hull according to a ship type and a working condition, and selecting a position where a spoiler is arranged; according to numerical calculation and a model test, a streamline near a stern and a hull is obtained, and a spoiler is arranged at the downward flowing position of the streamline in front of a stern shaft; 2, evaluating the drag reduction effect corresponding to each attack angle by adopting numerical calculation; comparing the total resistance value R0 before the spoiler is additionally mounted with the total resistance Ri of the ship after the spoiler is additionally mounted to determine which attack angle is finally adopted; 3, evaluating the ship resistance reducing effect of the spoiler, and judging whether the scheme of the spoiler continues to be modified or not according to the effect; the anti-drag effect of the device is verified by means of numerical calculation or model test and the like. The spoiler is arranged on the ship body in front of the tail shaft, and water flow is adjusted from obliquely downward flow to horizontally backward flow, so that the resistance of the ship is reduced, and the propelling efficiency of the propeller is improved.
本发明涉及一种船舶艉部近船体流场调节方法,包括如下步骤:第一步:根据船型和工况计算船身附近的流场,选择扰流板布置的位置;根据数值计算、模型试验得到船尾船壳附近的流线,在艉轴前方流线开始向下流动处布置扰流板;第二步:采用数值计算评估各个攻角对应的减阻效果;对比加装扰流板前的总阻力值R0和加装扰流板后的船舶总阻力Ri决定最终采用哪种攻角;第三步:评估扰流板减小船舶阻力的效果,根据效果判断是否继续修改扰流板方案;通过数值计算或模型试验等手段验证该装置的减阻效果。本发明通过在艉轴前方的船体上布置扰流板,将水流从斜向下流动调整为水平向后流动,从而降低船舶阻力,提升螺旋桨推进效率。
Ship stern near-hull flow field adjusting method
一种船舶艉部近船体流场调节方法
2025-03-14
Patent
Electronic Resource
Chinese
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
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