Volume 15 Issue 1
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Article Navigation >  Water Science and Engineering  > 2022  >  15(1): 47-56
Dong-fang Liang, Hao Jia, Yang Xiao, Sai-yu Yuan. 2022: Experimental investigation of turbulent flows around high-rise structure foundations and implications on scour. Water Science and Engineering, 15(1): 47-56. doi: 10.1016/j.wse.2021.12.002
Citation: Dong-fang Liang, Hao Jia, Yang Xiao, Sai-yu Yuan. 2022: Experimental investigation of turbulent flows around high-rise structure foundations and implications on scour. Water Science and Engineering, 15(1): 47-56. doi: 10.1016/j.wse.2021.12.002
shu

Experimental investigation of turbulent flows around high-rise structure foundations and implications on scour

doi: 10.1016/j.wse.2021.12.002

  • a Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK;

  • b State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;

  • c Yangtze Institute for Conservation and Development, Hohai University, Nanjing 210098, China

Funds:

This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFC0402605), the National Natural Science Foundation of China (Grant No. 51779080), the Fok Ying Tung Education Foundation (Grant No. 20190094210001), the Natural Science Foundation of Jiangsu Province (Grant No. BK20191299), and the 111 Project of the Ministry of Education and State Administration of Foreign Expert Affairs of China (Grant No. B17015).

  • Received Date: 2021-06-10
  • Accepted Date: 2021-09-10
    • Available Online: 2022-03-07
    Abstract
  • Many studies have been undertaken to predict local scour around offshore high-rise structure foundations (HRSFs), which have been used in constructing the Donghai Wind Farm in China. However, there have been few works on the turbulent flow that drives the scour process. In this study, the characteristics of the turbulent flow fields around an HRSF were investigated using the particle image velocimetry technique. The mean flow, vorticity, and turbulence intensity were analyzed in detail. The relationship between the flow feature and scour development around an HRSF was elaborated. The results showed that the flow velocity increased to its maximum value near the third row of the pile group. The shear layer and wake vortices could not be fully developed downstream of the last row of the piles at small Reynolds numbers. The strong flow and turbulent fluctuation near the third piles explained the existence of a long-tail scour pattern starting from the HRSF shoulders and a trapezoidal deposition region directly downstream of HRSF. This laboratory experiment gains insight into the mechanism of the turbulent flow around HRSFs and provides a rare dataset for numerical model verifications.

     

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