Experimental Investigation of Scour Induced by Twin-Propeller Wash

Advancement of technology has improved the efficiency of marine trading activities through use of vessels equipped with twin propellers instead of a single propeller. The progression from a single propeller to twin propellers will certainly increase occurrences of scour unless protection measures are studied and designed accordingly. An experiment to model a ship’s twin-propeller wash was conducted on a flat noncohesive soil bed for observation of scour. The asymptotic scour profile was defined in the following four stages: (1) initial, (2) developing, (3) merging, and (4) asymptotic. An equation is proposed to relate the densimetric Froude number, clearance ratio, and reference time scale to the predicted maximum scour depth and area. The predicted equations were found to be highly correlated with the observed parameters.

• Record URL:
  https://doi.org/10.1061/(ASCE)WW.1943-5460.0000387
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0733950X
• Supplemental Notes:
  • © 2017 American Society of Civil Engineers.
• Authors:
  • Yew, Wan-Tian
  • Hashim, R
  • Ng, Khai-Ching
• Publication Date: 2017-7

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04017006
• Serial:
  • Journal of Waterway, Port, Coastal, and Ocean Engineering
  • Volume: 143
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-950X
  • EISSN: 1943-5460
  • Serial URL: http://ascelibrary.org/journal/jwped5

Subject/Index Terms

• TRT Terms: Cohesive soils; Froude number; Marine transit; Propellers; Scour; Ships; Technological innovations; Vessel operations; Washing
• Subject Areas: Data and Information Technology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 01627841
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Feb 28 2017 9:11AM