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Ship Propeller Rotation Threshold to Prevent Erosion and Sedimentation in Coastal Waters

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Ship Propeller Rotation Threshold to Prevent Erosion and Sedimentation in Coastal Waters
The rotation of a ship's propeller can accelerate the water flow around it,which puts pressure on seabed particles.Continuous pressure on the seabed can significantly trigger erosion and sedimentation of coastal waters.Considering the impact that can be caused,the ship's propeller rotation limit needs to be determined to avoid damage to the aquatic ecosystem.This research determines the threshold of ship propeller rotation based on the water flow velocity characteristic.Research has been carried out at the Hydrodynamics Laboratory on several variations of propeller rotation Rrpm(r/min)and water depth using empirical approaches,numerical simulations,and scale model experiments.Analysis based on general standard criteria for erosion and sedimentation shows that a propeller with a diameter(Dp)of 1.5 m is safe for propeller rotation at 25 r/min at all water depths.Then,the propeller rotation of 75 r/min is safe for a distance between the propeller axis and the bottom of the water equal to Dp.Meanwhile,rotation at 120 r/min is safe at a minimum distance of 1.5 Dp,and 230 r/min is safe for a minimum distance of 2.0 D.The propeller rotation threshold criteria are essential to determining the new under-keel clearance for environmentally friendly ship operations.Threshold values vary based on seabed particle type and water depth.

Landing craft tankWater flow velocitySeabed erosionUnder keel clearance

Abdul Kadir、I.Istadi、Agus Subagio、I.Iskendar、W.Waluyo、Abdul Muis、Dewi Kartikasari、Siti Sadiah、A.B Widagdo、M.P Helios、Mochammad Nasir、N.Nurhadi

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Doctoral Program of Environmental Science,School of Postgraduate Studies,Universitas Diponegoro,Semarang,Central Java 50275,Indonesia

Research Center for Transportation Technology,National Research and Innovation Agency(BRIN),Jakarta 10340,Indonesia

Department of Chemical Engineering,Faculty of Engineering,Universitas Diponegoro,Semarang,Central Java 50275,Indonesia

Department of Physics,Faculty of Science and Mathematics,Universitas Diponegoro,Semarang,Central Java 50275,Indonesia

Research Center for Hydrodynamic Technology,National Research and Innovation Agency(BRIN),Jakarta 10340,Indonesia

Research Center for Energy Conversion and Conservation,National Research and Innovation Agency(BRIN),Jakarta 10340,Indonesia

Directorate of Laboratory Management,Research Facilities,and Science and Technology Park,National Research and Innovation Agency(BRIN),Jakarta 10340,Indonesia

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Landing craft tank Water flow velocity Seabed erosion Under keel clearance

2024

10.1007/s11804-024-00470-x

哈尔滨工程大学学报(英文版)
哈尔滨工程大学

哈尔滨工程大学学报(英文版)

CSTPCD
影响因子：0.381
ISSN：1671-9433
年,卷(期)：2024.23(4)