Proceedings of the Korea Committee for Ocean Resources and Engineering Conference (한국해양공학회:학술대회논문집)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Comparison of Numerical and Experimental Stability of Dual Subsea Pipeline in Trench

트렌치내에서 복합 해저 관로 안정성의 수치해석과 실험해석 비교

  • Chul H. Jo (Dept.of Naval Architecture Ocean Engineering, Inha University) ;
  • Young S. Shin (Dept. of Mechanical Engineering, Halla University) ;
  • Sung G. Hong ;
  • Kyoung H. Min ;
  • Chung, Kwang-Sic
  • Published : 2001.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

There are advantages in the installation of dual subsea pipelines over two separate single lines. In many case it can reduce the cost for trench, back-filling and installation. However the installation of dual pipelines often requires technical challenges. Dual Pipelines should be placed to be stable to external loading not only during the installation but also in the design life. Dual pipelines in trench can reduce the influence of external forces. To investigate applied forces as slope changes, number of experiments are conducted with PIV (Particle Image Velocimetry) in a circulating water channel. Numerical approaches are also made to compare with experimental results. The velocity fields around dual pipelines in trench are investigated and analysed. Comparison of both results show similar pattern of flow around dual pipelines. it is proved that the trench slope affects the pipeline stability significantly. The results can be applied in the stability design of dual pipelines in trench section. The complex flow patterns can be referenced effectively linked in the understanding of fluid around circular bodies in trench.

Keywords