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.

假发（地面效应的机翼）或明智的S（地表效应船的机翼）将来是海路上的高速车辆之一。必须开发具有扁平特征的机翼部分，以避免由于表面效应的非线性而避免海上意外的船舶运动。从3个观点，对假发的性能评估方法的研究如下：1。制定和近似解决方案方法的流场周围的假发（L）高宽高比近似3D从扰动方法的视角近似，进行了一项研究，以明确了假发的3D效应。由于在升降线中看到的落后涡流引起的落后漩涡效应可忽略地构建了升降率的效果，而构建了跨度效应的跨度和2D。两种区域的复合解决方案在整个区域与计算解决方案均表现出良好的一致性。（2）在常规的海上解决方案方法中，2D假发的不稳定运动增强了，以解决2D WIG的辐射和衍射问题。基于入射波的船舶运动后期的辐射和衍射问题不仅取决于整个WIG的频率，而且还取决于新的频率频率，还取决于新的频率，还取决于新的频率延长的频率，并在新的频率上进行了固定的频率。 2D Wigit的形状优化旨在通过使用非线性编程方法获得具有最大升力系数的2D假发部分。在某些受限条件下，获得了波浪状横截面3。假发周围流场的2D WIGA数值分析的波产生效应是通过波产生的效果应用了Green的功能。线性涡旋晶格元件代表厚假发可获得良好的结果。