CHARACTERISTICS OF THE BOUNDARY LAYER NEAR THE JUNCTURE WITH 3-DIMENSIONALLY SEPARATED VORTICES

本文的目的是用实验方法研究边界层中纵向涡的特性。本文主要利用三热线风速仪对湍流或雷诺应力在速度场中的特性进行了研究，得到了以下结果.本文研究了平板边界层与圆柱马蹄涡的相互作用。本文利用这些相互作用系数计算了脉动流中由于粗糙度引起的海洋结构物阻力增加。结果表明，与实验测量的一个良好的协议。在KSNAJ春季会议上提交了一份文件（1994年）。在风洞中用三线风速仪测量了一个完整船型的绕流场，研究了流场的湍流特性和雷诺应力。为验证计算结果的正确性提供了准确的数据基础。论文将在第27届湍流研讨会上发表。（1995年）3.本文用三根热线风速仪对平板边界层与翼尖涡的相互作用进行了初步研究。结果显示了涡心附近湍流和雷诺应力的基本特征。实验结果将在KSNAJ秋季会议上公布。（1995）4.采用厚边界理论计算了有自由面和三维分离涡的船尾附近流场。计算结果与实验结果定性一致。

The objective of this paper is to investigate experimentally into the characteristics of the boundary layr with longitudinal vortices near the juncture. The investigation on characteristics of turblence or Reynolds stress in the velosity field are mainly aimed using triple hot wire anemome try.The following results are obtained.1. Interaction between boundary layr on a flat plate and horse shoe vortices around circular cylinders on it are investigated. The resistance increse of marine structures due to the roughness in oscilating flows are calculated using the interaction factors. The results shows good agreement with the experimentally measured one. A paper has presented at the spring meeting of the KSNAJ,(1994).2. Flow fields around a full ship form are measured in the wind tunnel by the triple wire anemonetry to investigate the characteristics of turbulence and Reynolds stresses. The accurate data-bases are obtained to validate the CFD results near the ship stern flow field. A paper will be presented at the 27th Symposium on Turbulence. (1995)3. Basic investigation into the interaction between the boundary layr on the flat plate and a wing tip vortex is performed by the triple hot wire anemomertry. The results show the basic characteristics of the turbulence and Reynolds stress near the vortex center. Experimental resuls will be presented at the Autum meeting of the KSNAJ.(1995)4. Thick boundary theorm is applied to calculate the flow field near the stern with free surface and 3-d separated vortices. The results show qualitative agreement with the experimental results.