Experimental investigation on axial velocity distribution for ship’s twin-propeller jets

Yew, W.T. and Hashim, Roslan and Ng, K.C. (2017) Experimental investigation on axial velocity distribution for ship’s twin-propeller jets. Journal of the Chinese Institute of Engineers, 40 (3). pp. 191-199. ISSN 0253-3839, DOI https://doi.org/10.1080/02533839.2017.1299593.

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Official URL: http://dx.doi.org/10.1080/02533839.2017.1299593


The investigation of twin-propeller jets as ships undergo acceleration is essential. This form of jet has been triggering problematic consequences such as seabed scouring. In order to prevent such scouring, near-bed velocities must first be analyzed in order to design the necessary protection when the under keel clearance of a ship is low when it is near port structures. This paper presents experimental work performed by Laser Doppler Anemometry. It is noticed that research into twin-propeller jet profiles still remains limited in the literature. Therefore, we intend to analyze twin-propeller axial velocity profiles and look into several flow characteristics such as efflux velocity and its decay pattern. Also, the measured velocity profile is compared to that of a single-propeller jet. Current results show that scouring is more severe in the case of the twin-propeller jets.

Item Type: Article
Uncontrolled Keywords: Twin-propeller jet; Axial velocity profile; Axial velocity decay
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Jul 2018 02:07
Last Modified: 31 May 2019 05:19
URI: http://eprints.um.edu.my/id/eprint/18928

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