Studies on performance evaluation method of a wing in surface effect

机翼表面效应性能评价方法研究

基本信息

批准号：
08305039
负责人：
MATSUMURA Kiyoshige
金额：
$ 3.97万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08305039/
关键词：
surface effect ship WIG Performance in sea perturbation method optimization Green's function wave generation vortex sheet 静安定動安定誘導抗力キャンバー

项目摘要

WIG( Wing In Ground effect) or WISE S (Wing in Surface Effect Ship) is expected in future as one of high speed vehicles on seaway. Wing section with flat characteristics in motion has to be developed to avoid unexpected ship motion in sea due to nonlinearity of surface effect.From 3 points of view, studies on performance evaluation method of WIG are made as followings :1. Formulation and approximate solution method of flow field around a WIG(l)High aspect ratio approximation of 3D WIGFrom the view point of perturbation method, a study is made to clear 3D effects of WIG.Since the downwash effect due to the trailing vortex seen in the lifting line theory is negligible, local solutions of circulation distribution with wing tip effect are constructed and 2D solution is applied in the mid span area. Composite solution of both areas shows good agreement in whole area with a computational solution.(2) Unsteady motion of 2D WIG in regular seaApproximate solution method is enhanced to solve a radiation and diffraction problem of 2D WIG.Phase late of ship motion based on incident wave is dependent not only on the ordinary frequency rate based on whole WIG length but also on the newly defined frequency parameter based on a deficient length in appearance.2. Shape optimization of 2D WIGIt is intended to obtain a 2D WIG section with maximum Lift coefficient by using a nonlinear programming method. Under some restricted condition a wavy cross section is obtained.3. Wave generation effect of 2D WIGA numerical analysis of flow field around a WIG is made applying Green's function with the effect of wave generation. Linear vortex lattice element to represent a thick WIG gives good results.

WIG（地效翼）或WISE S（地效翼）有望成为未来海上高速交通工具之一。为了避免由于表面效应的非线性导致船舶在海上发生意外运动，必须开发运动中具有扁平特性的翼段。从三个角度对地效翼机的性能评估方法进行了研究： 1．地效IG周围流场的公式及近似求解方法(l)3D地效IG的高展弦比近似从摄动法的角度研究了地效IG的3D效应。忽略升力线理论，构建考虑翼尖效应的环流分布局部解，并在跨中区域应用二维解。两个区域的复合解与计算解在整个区域上表现出良好的一致性。(2)规则海中二维地效IG的非定常运动增强近似求解方法来解决二维地效IG的辐射和衍射问题。基于入射的船舶运动晚相波不仅取决于基于整个地效翼长度的普通频率，还取决于基于外观缺陷长度的新定义的频率参数。 2． 2D WIG的形状优化旨在通过非线性规划方法获得具有最大升力系数的2D WIG截面。在一定的限制条件下，得到了波形截面。 3．二维WIGA的波产生效应应用格林函数和波产生效应对地效翼周围流场进行了数值分析。表示厚 WIG 的线性涡旋晶格单元给出了良好的结果。