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Laboratory Study of Turbulence Intensity in Longitudinal, Transverse and Deep Directions and Turbulent Burst Event around Various L-Shaped Groynes

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
Groyne structure has been used for indirect coastal protection that has a simple structure and low execution cost. Flow field around the groyne is very complex. The purpose of present research is to study turbulence intensity in longitudinal, transverse and deep directions and turbulent burst phenomenon around various L- shaped (Γ nes. In order to conduct the research, L-shaped groynes were installed in laboratory channel and three – dimensional components of flow velocity were measured by Acoustic Doppler velocimeter (ADV). According to the conducted research on turbulence intensity in longitudinal, transverse and deep directions and drawing the corresponding figures, it was determined that location of maximum turbulence intensity is in the vicinity of groynes wing and along the shear layer of flow. In addition, the values of maximum turbulence intensity in transverse and deep directions in Γ groyne are respectively 79.9 and 27.4 percent of maximum longitudinal tu ne are respectively 67.9 and 23 percent of maximum longitudinal turbulence intensity. According to the conducted experiments in the present research, turbulent burst event was studied in various L- shaped groynes. In the cape zone of groynes, the probability of ejection is more than that of other quadruple events of turbulence. In upstream zones of groynes, the probability of occurrence of sweep is more than inward and outward internation. The probability of occurrence of sweep is decreased by approaching the groyne structure and again increases in the downstream of groyne.
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International Journal of Science and Engineering Investigations, Volume 6, Issue 67, August 2017 54
www.IJSEI.com Paper ID: 66717-09
ISSN: 2251-8843
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