In this study, breakwater model which has several outlet pipes to discharge water is settled in the experimental open channel and mean velocity distributions of multi wall jet are measured. The length of zone of flow establishment of wall jet is shorter than that of free jet and decay rate of jet centerline longitudinal velocity along x is linear in 0.3≤x/lp≤17. The rate of vertical width and lateral width spreading of multi wall jet is respectively 0.0753, 0.157.

• 김대근(대불대학교 토목환경공학과) | Dae-Geun Kim Corresponding Author
• 서일원(서울대학교 토목공학과) | Il-Won Seo