Experimental investigation of scour induced by twin-propeller wash

Wan Tian Yew, R. Hashim, Khai Ching Ng

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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
Volume143
Issue number4
DOIs
Publication statusPublished - 01 Jul 2017

Fingerprint

Scour
Propellers
scour
Ship propellers
Froude number
Merging
vessel
timescale
Soils
soil
experiment
Experiments

All Science Journal Classification (ASJC) codes

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

Cite this

@article{6f83408027bf4c498a7690311eb02492,
title = "Experimental investigation of scour induced by twin-propeller wash",
abstract = "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.",
author = "Yew, {Wan Tian} and R. Hashim and Ng, {Khai Ching}",
year = "2017",
month = "7",
day = "1",
doi = "10.1061/(ASCE)WW.1943-5460.0000387",
language = "English",
volume = "143",
journal = "Journal of Waterway, Port, Coastal and Ocean Engineering",
issn = "0733-950X",
publisher = "American Society of Civil Engineers (ASCE)",
number = "4",

}

Experimental investigation of scour induced by twin-propeller wash. / Yew, Wan Tian; Hashim, R.; Ng, Khai Ching.

In: Journal of Waterway, Port, Coastal and Ocean Engineering, Vol. 143, No. 4, 04017006, 01.07.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental investigation of scour induced by twin-propeller wash

AU - Yew, Wan Tian

AU - Hashim, R.

AU - Ng, Khai Ching

PY - 2017/7/1

Y1 - 2017/7/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85018880677&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018880677&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)WW.1943-5460.0000387

DO - 10.1061/(ASCE)WW.1943-5460.0000387

M3 - Article

VL - 143

JO - Journal of Waterway, Port, Coastal and Ocean Engineering

JF - Journal of Waterway, Port, Coastal and Ocean Engineering

SN - 0733-950X

IS - 4

M1 - 04017006

ER -