Study on the wave phenomena of a submerged wing which produces downward lifting force

水下翼产生向下升力的波浪现象研究

基本信息

批准号：
06452350
负责人：
MORI Kazu-hiro
金额：
$ 4.48万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452350/
关键词：
Wave making Submerged wing lift Down ward 抵抗造波抵抗境界要素法

项目摘要

Wave phenomena of a submerged ship with a pare of wings are investigated numerically by making use of the boundary element method. In the simulation, triangular panels are used to represent the general 3-D shape. All the variables are linearly approximated on each panel. The Kutta condition is imposed in all the computational time domain by using a simple iterative procedure. Various computations are performed by changing the aspect ratio of wings and the location to investigate the wave phenomena. Through the investigation, it is found that the wave resistance of the ship can be reduced by a downward lifting force of the wing.Wave reduction of a ship by wings attached to hull is investigated by Rankine source method. In the simulation, the wing is approximately replaced by a lifting line. For the confirmation of the present computational results, comparative model tests with and without wings are carried out. The agreement between the computation and the experiment confirmed that the wing can be replaced by a lifting line. Various compitations are performed by changing the location, angle of attack and ship speed to investigate the wave phenomena and to analyze the mechanism of the interaction between the main hull and the attached wings. Through these investigation, it is found that the wave resistance of the ship can be reduced by a proper selection of the location and lifting force of the wing. This finding is confirmed through the comparison of wave profile.

利用边界元法对一对机翼水下船舶的波浪现象进行了数值研究。在模拟中，三角形面板用于表示一般的 3D 形状。所有变量在每个面板上都是线性近似的。通过使用简单的迭代过程在所有计算时域中施加库塔条件。通过改变机翼的纵横比和研究波浪现象的位置来执行各种计算。通过研究发现，通过机翼向下的升力可以降低船舶的波浪阻力。采用朗肯源法研究了船体附装机翼对船舶减浪的影响。在模拟中，机翼近似地由升力线代替。为了验证当前的计算结果，进行了有翼和无翼的对比模型试验。计算和实验之间的一致性证实机翼可以用升力线代替。通过改变位置、迎角和船速进行各种模拟，以研究波浪现象并分析主船体与附属机翼之间相互作用的机制。通过这些研究发现，通过适当选择机翼的位置和升力，可以降低船舶的波浪阻力。通过波形的比较证实了这一发现。