KAJIAN EKSPERIMEN VISCOUS FORM FACTOR PADA HAMBATAN KAPAL KATAMARAN
Main Article Content
Abstract
Kapal katamaran saat ini banyak menarik perhatian karena memiliki tingkat efisiensi dan performansi hidrodinamika yang lebih baik dibandingkan dengan kapal konvensional (bentuk monohull). Salah satu tantangan yang dihadapi oleh para pakar perkapalan adalah memprediksi secara akurat karakteristik hidrodinamika hambatannya. Makalah ini mengkaji secara eksperimental di kolam tarik (towing tank) untuk mendapatkan nilai viscous form factor pada lambung kapal katamaran pada beberapa variasi kecepatan. Viscous form factor merupakan komponen hambatan yamg penting dalam menghitung hambatan viskos kapal. Model uji adalah katamaran simetris dengan beberapa bervariasi jarak antara lambung. Hasil pengujian di towing tank dibandingkan dengan hasil uji di terowongan angin (wind tunnel). Hasil uji model disajikan dalam bentuk tabel dan grafik dan didiskusikan dengan beberapa hasil kajian para pakar lainnya. Pada penelitian eksperimental ini, hasil yang diperoleh menunjukkan bahwa viscous form factor pada lambung katamaran adalah lebih besar dibandingkan demihull. Fenomena ini menunjukkan adanya efek interaksi hambatan yang ditimbulkan oleh jarak antara lambung. Disamping itu, semakin besar jarak antara lambung maka semakin kecil nilai viscous form factor-nya. Fenomena ini dapat dijadikan masukan bagi para designer dalam memprediksi total hambatan kapal dan selanjutnya menentukan besar daya mesin kapal katamaran secara akurat dan rasional
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
References
Blackwell, T.J. (2011). Subsonic Wind-Tunnel Wall Corrections on a Wing with a Clarck Y-14 Airfoil, The Faculty of the Department of Mechanical and Aerospace Engineering, San Jose State University.
Bertram, V. (2000). Practical Ship Hydrodynamics, Butterworth-Heinemann, Linacre House, Jordan Hill, Oxford OX2 8DP, UK., pp. 74.
Couser, P.R., Molland, A.F., Amstrong, N.A., and Utama, I.K.A.P. (1997). Calm Water Powering Prediction for High Speed Catamarans, Proceedings of Fourth International Conference on Fast Sea Transportation, FAST’97, Sydney.
Dubrovsky, V., and Matveev, K.,(2005). Passenger Vessels for the New Millennium: New Types of Sea-Going Multi-Hull Ships with Superior Comfort Level and Safety, Joint Meeting of the Pacific Region Sections, California Maritime Academy, California, May 13 and 14.
Hughes, G. (1954). Friction and Form Resistance in Turbulent Flow, and a Proposed Formulation for Use in Model and Ship Correlation, Transactions of RINA, Vol. 96.
Hughes, G. (1966). An Analysis of Ship Model Resistance into Viscous and Wave Components, Transactions of RINA, Vol. 108.
Insel, M., and Molland, A.F. (1991). An investigation into the resistance components of high speed displacement catamaran, Royal Institution of
Naval Architects, Spring Meeting, Paper No. 11.
Insel M. and Molland A.F. (1992). An Investigation into the Resistance Components of High Speed Displacement Catamarans” RINA Transactions,
Vol.134.
ITTC (2002). Recommended Procedures and Guidelines, Testing and Extrapolation Methodsin Resistance Towing Tank Tests, ITTC
7,5-02-02-02.
Jamaluddin, A., Utama, IKAP.,(2002). Experimental Investigations into the Resistance Components of Symmetrical Catamarans with Variation Hull
Clearances and Staggers, International Journal of Small Craft Technology, Transactions of the Royal Institution of Naval Architects (RINA), Vol. 154, Part B1, p 13-18.
Jamaluddin, A., Utama, IKAP., and Molland, A.F., Experimental and Numerical Study of the Resistance Component Interactions of Catamarans,
Journal Engineering for the Maritime Environment, The Institution of Mechanical Engineers, Vol. 227 No.1, p 51 – 60.
Molland, A.F. (2008). A Guide to Ship Design, Construction and Operation, The Maritime Engineering Reference Book, Butterworth-
Heinemann, Elsevier.
Molland, A.F., Turnock, S.R., dan Hudson, D.A. (2011). Ship Resistance and Propulsion: Practical Estimation of Ship Propulsive Power, Cambridge
University Press, New York, USA.
Moraes, H.B., Vasconcellos, J.M., dan Almeida, P.M. (2007). Multiple Criteria Optimization Applied to High Speed Catamaran Preliminary Design,
Ocean Engineering,Volume 34, , pp. 133 – 147.
Sahoo, P.K., Salas, M., and Schwetz, A. (2007). Practical evaluation of resistance of high-speed catamaran hull forms – Part I, Ships and Offshore
Structures, 2:4, 307 – 324.
Utama, I K A P., (1999). An Investigation into the Viscous Resistance of Catamaran Form, PhD Thesis, Department of Ship Science, the University of Southampton, UK.
Yeung, R.W., Wan, H. (2008). Multihull and Surface Effect Ship Configuration Design: A Framework for Powering Minimization, Journal of Offshore
Mechanics and Arctic Engineering (OMAE), Vol.130, August.
Zaghi, S., Broglia, R., dan Mascio, A. (2011). Analysis of an Interference Effect for High Speed Catamarans by Modedl Tests and Numerical
Simulations, Journal of Ocean Engineering, Volume 38, Issues 17-18, pp. 2110 – 2122.