Experimental investigation of scour induced by twin-propeller wash

Wan Tian Yew, R. Hashim, Khai Ching Ng

Research output: Contribution to journalArticle

3 Citations (Scopus)


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.

Original languageEnglish
Article number04017006
JournalJournal of Waterway, Port, Coastal and Ocean Engineering
Issue number4
Publication statusPublished - 01 Jul 2017

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology
  • Ocean Engineering

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