Journal of Applied Science and Engineering

Published by Tamkang University Press


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Abdul Kadir1,4This email address is being protected from spambots. You need JavaScript enabled to view it., Istadi1,2, Agus Subagio1,3, Iskendar4, Waluyo4, Dewi Kartikasari4, Hendra Palebangan4, Siti Sadiah4, Sutriyanto Himawan5, Putri Virliani6, Y.F. Kusuma6, Dwi Wahyudi7, Erlangga Satria Aidil Putra7, and Fadila Norasarin Eritha7

1Doctoral Program of Environmental Science, School of Postgraduate Studies, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia

2Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia

3Department of Physics, Faculty of Science and Mathematics, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia

4Research Center for Transportation Technology, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia

5Research Center for Energy Conversion and Conservation, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia

6Research Center for Hydrodynamic Technology, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia

7Directorate of Laboratory Management, Research Facilities, and Science and Technology Park, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia



Received: June 20, 2023
Accepted: September 22, 2023
Publication Date: November 21, 2023

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The posture of water flow velocity generated by the rotation of the ship’s propeller needs to be studied to see the performance of the propeller and the potential for scouring that the seabed can cause. This study aims to comprehensively determine the characteristics of the water flow velocity of the External Counter Rotating Twin Propeller (ECRTP) system based on variations in water depth and propeller rpm. The investigation uses an empirical approach, numerical simulations and scale model experiments in the hydrodynamics laboratory to approach the actual water flow velocity. Maximum water flow velocity occurs around the propeller blades and decreases gradually as the horizontal distance to the rear of the propeller increases. In contrast, the water flow velocity on the centerline axis between the propeller axes shows the opposite trend. Each depth has a different water flow velocity posture based on the propeller rpm variation. This research can be applied to improve the performance of a ship’s twin propeller system and anticipate the impact of scour on the seabed.

Keywords: Ship Propeller, Twin Propeller, Propeller Rotation, Seabed Scour, Water Depth

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