초록

The flow characteristics around the vertical wall with the flap were visualized in the water channel using PIV. And the effect of flap angle change was investigated to see how quickly the spreading can be prevented and confined if oil spill occurs at sea. As a result, the fluid in the front of the vertical wall flows constantly, Nearing a boundary layer on the vertical wall, and a flow separation phenomenon occurs. Thereafter, flow loss or depth loss to the bottom of the vertical wall was confirmed. Also, it was observed that irregular reverse circulation flow occurred due to flap angle change and pressure gradient at the back of vertical wall. In this study, it was analyzed that it is most effective at 20 degrees angle. In the future, it is necessary to confine the flow characteristics of PIV and CFD by assuming that there is a double vertical wall in which oil having a lower specific gravity than water is trapped in the oil fence.

키워드

Boundary layer(경계층), Particle image velocimetry(입자영상유속계), Flow field(유동장), Separation flow(유동박리), Flap(플랩)

참고문헌(5)open

  1. [학술대회] Lee J. M. / 2001 / PIV Analysis of Flow around Bulkhead / Proceedings of Spring

  2. [단행본] Cormack D. / 1983 / Response to Oil and Chemical Marine Pollution / Applied Science Publishers

  3. [보고서] Sloan S. L. / 1995 / Phase 2:At Sea Towing Tests of Fire Resistant Oil Containment Booms

  4. [보고서] Kim J. E. / 2018 / A Study on the Flow Characteristics around Double Barriers by CFD and PIV : 12 ~ 15

  5. [학술지] Oebius H. U. / 1999 / Physical Properties and processes that influence the clean up of oil spills in the marine environment / Spill Sci. Tech Bull : 177 ~ 289