Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests

This paper examines the hydrodynamic behavior of a tubular vertical cylinder with anode fittings subjected to regular waves. The model experiments were carried out in the wave basin of Universiti Teknologi PETRONAS. The model was made from galvanized steel, with outer diameter Do= 0.034 m and tota...

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Main Authors: Kurian, V.J., Al Yacouby, A. M., Sebastian, A.A., Liew, M. S.
Format: Citation Index Journal
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.11310 /
Published: 2014
Subjects:
TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
Online Access: http://eprints.utp.edu.my/11310/1/AMM%20Vol%20567%20pp%20241-246%20Paper_Kurian.pdf
http://eprints.utp.edu.my/11310/
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spelling utp-eprints.113102017-03-20T01:59:19Z Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests Kurian, V.J. Al Yacouby, A. M. Sebastian, A.A. Liew, M. S. TA Engineering (General). Civil engineering (General) TC Hydraulic engineering. Ocean engineering This paper examines the hydrodynamic behavior of a tubular vertical cylinder with anode fittings subjected to regular waves. The model experiments were carried out in the wave basin of Universiti Teknologi PETRONAS. The model was made from galvanized steel, with outer diameter Do= 0.034 m and total length l = 1.23 m, fixed vertically to the soffit of the wave tank bridge, and the free end was immersed in the wave tank to form a cantilevered beam with wetted length of 0.85 m. Overall, seven anodes were welded to the wetted length of the tubular cylinder, at a center to center spacing of 0.12 m. The model was subjected to regular wave with Hmax varying from 0.1 m to 0.2 m, with wave height increment of 0.05 m, and the time period varying from T = 1 s to 3 s. The tests were conducted for Keulegan-Carpenter number ranging from 3.9 to 23.3. The hydrodynamic forces and the corresponding hydrodynamic coefficients of the smooth cylinder were compared with the force responses of a tubular cylinder with the same outer diameter, fitted with anodes. A scale factor of 1:55 was adopted in this experimental study based on the limitations of the maximum water depth in the wave tank, and the scaled up force responses of the full scale prototype were analyzed and discussed. The results show that, installation of anodes has increased the drag coefficients by up to 20% depending on the wave frequencies at which the model was tested. 2014-06 Citation Index Journal PeerReviewed application/pdf http://eprints.utp.edu.my/11310/1/AMM%20Vol%20567%20pp%20241-246%20Paper_Kurian.pdf Kurian, V.J. and Al Yacouby, A. M. and Sebastian, A.A. and Liew, M. S. (2014) Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests. [Citation Index Journal] http://eprints.utp.edu.my/11310/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
topic TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
spellingShingle TA Engineering (General). Civil engineering (General)
TC Hydraulic engineering. Ocean engineering
Kurian, V.J.
Al Yacouby, A. M.
Sebastian, A.A.
Liew, M. S.
Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
description This paper examines the hydrodynamic behavior of a tubular vertical cylinder with anode fittings subjected to regular waves. The model experiments were carried out in the wave basin of Universiti Teknologi PETRONAS. The model was made from galvanized steel, with outer diameter Do= 0.034 m and total length l = 1.23 m, fixed vertically to the soffit of the wave tank bridge, and the free end was immersed in the wave tank to form a cantilevered beam with wetted length of 0.85 m. Overall, seven anodes were welded to the wetted length of the tubular cylinder, at a center to center spacing of 0.12 m. The model was subjected to regular wave with Hmax varying from 0.1 m to 0.2 m, with wave height increment of 0.05 m, and the time period varying from T = 1 s to 3 s. The tests were conducted for Keulegan-Carpenter number ranging from 3.9 to 23.3. The hydrodynamic forces and the corresponding hydrodynamic coefficients of the smooth cylinder were compared with the force responses of a tubular cylinder with the same outer diameter, fitted with anodes. A scale factor of 1:55 was adopted in this experimental study based on the limitations of the maximum water depth in the wave tank, and the scaled up force responses of the full scale prototype were analyzed and discussed. The results show that, installation of anodes has increased the drag coefficients by up to 20% depending on the wave frequencies at which the model was tested.
format Citation Index Journal
author Kurian, V.J.
Al Yacouby, A. M.
Sebastian, A.A.
Liew, M. S.
author_sort Kurian, V.J.
title Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
title_short Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
title_full Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
title_fullStr Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
title_full_unstemmed Effect of Anodes on Hydrodynamic Coefficients of Tubular Cylinders - Model Tests
title_sort effect of anodes on hydrodynamic coefficients of tubular cylinders - model tests
publishDate 2014
url http://eprints.utp.edu.my/11310/1/AMM%20Vol%20567%20pp%20241-246%20Paper_Kurian.pdf
http://eprints.utp.edu.my/11310/
_version_ 1741196134773161984
score 11.62408

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