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Flow Characteristics around Underwater Triangular Structure with Different Inclination

경사도가 다른 수중 삼각형상구조물 주위의 유동특성

  • Choe, Sang-Bom (Training Ship, Mokpo National Maritime University) ;
  • Cho, Dae-Hwan (Division of Marine Engineering System, Mokpo National Maritime University)
  • 최상범 (목포해양대학교 실습선) ;
  • 조대환 (목포해양대학교 기관시스템공학부)
  • Received : 2014.02.19
  • Accepted : 2014.04.25
  • Published : 2014.04.30

Abstract

The purpose of this study is to investigate the flow characteristics around underwater triangular structure with various inclination and Reynolds number. A flow fields around the triangular structure model were measured by visualization method and PIV in the circulating water channel. The result of the experiment is where the triangular structure that has a inclination of $45^{\circ}$ and the reynolds number at $Re=2.9{\times}10^3$ showed rising velocity component to 2.7 times of the structure height. When the reynolds number is steady and when the inclination is greater the descending velocity component of the structure's rears current form is greatly shown and for the areas where it's more than y/hs=1.75 has a change in the angle of inclination but it doesn't give a great effect to it.

본 연구에서는 수중 삼각형상구조물의 경사도와 레이놀즈 수 변화에 따른 구조물 주위의 유동특성을 분석하였다. 모델링한 삼각형상구조물 주위의 유동장은 회류수조에서 가시화실험과 입자영상유속계(PIV)를 이용하여 계측하였다. 실험결과 경사각이 $45^{\circ}$인 삼각형상구조물이 레이놀즈 수 $Re=2.9{\times}10^3$에서 구조물 높이의 2.7배까지 상승하는 속도성분이 나타났다. 레이놀즈 수가 일정할 때 경사각이 클수록 구조물 후방에 하강하는 속도성분이 크게 나타났고, y/hs=1.75이상의 영역에서는 경사각과 레이놀즈 수가 구조물 후방의 유동형태에 변화를 주지 않았다.

Keywords

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  1. Flow Characteristics of the Artificial Upwelling Structure by Porosity Change vol.20, pp.2, 2017, https://doi.org/10.7846/JKOSMEE.2017.20.2.100