Cover Image

Wind Tunnel Investigation into the Resistance Analysis of Slender Body Catamaran

I Ketut Aria Pria Utama, S Sutiyo, Bagiyo Suwasono


DOI: https://doi.org/10.14710/kapal.v17i2.29867

Abstract


The Wind tunnel investigation of a slender body catamaran was conducted in order to determine its resistance characteristics, namely the effect of pressure and flow velocity changes for varied hull separation. The catamaran was tested in a wind tunnel belongs to Department of Mechanical Engineering, ITS, with hull separations of  S/L = 0.2 to 0.4 and variation in Reynolds numbers up to 4.46 x 105. Pressure around the hull was measured using pressure tappings and the flow velocity behind the hull was also measured using a Pitôt-static tube. The experimental study shows that the pressure coefficient decreases when the hull separation declines and conversely, the flow velocity increases. The tests demonstrated a viscous interaction between the hulls, and form factors for the monohull and catamaran are derived. The demihull exhibited a form factor (1+k) of 1.265 and in the catamaran mode, the measured form factor (1+βk) was between 1.416 and 1.403. The results are in agreement with other published data.


Keywords


Slender Body; Catamaran; Viscous; Experiment

Full Text:

PDF

References


A. Jamaluddin, I. Utama, B. Widodo, and A. Molland, “Experimental and numerical study of the resistance component interactions of catamarans,” Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, vol. 227, no. 1, pp. 51–60, Feb. 2013, doi: 10.1177/1475090212451694.

Sutiyo, E. Yuliora, and I. K. A. P. Utama, “Numerical Investigation Into The Pressure Distribution And Form Factor Effect Of Slenderbody Catamaran,” in Proceeding of the International Conference on Ship and Technology (ICSOT) 2019, Developments Marine Design Architecture, 2019, no. November, pp. 25–26.

H. Lackenby, “On the Systematic Geometrical Variation of Ship Forms,” Transactions of the TINA, 1950.

P. N. Joubert and N. Matheson, “Wind tunnel tests of two Lucy Ashton reflex geosims,” Journal of Ship Research, vol. 14, no. 4, 1970.

P. N. Joubert and P. H. Hoffman, “AN EXPERIMENTAL STUDY OF THE VISCOUS RESISTANCE OF A 0.564-C SUB B FORM,” Journal of Ship Research, vol. 23, no. 2, 1979.

A. F. Molland and I. K. A. P. Utama, “Experimental and numerical investigations into the drag characteristics of a pair of ellipsoids in close proximity,” Proceedings of the Institution of Mechanical engineers, Part M: Journal of Engineering for the Maritime Environment, vol. 216, no. 2, pp. 107–115, Dec. 2002, doi: 10.1243/147509002762224324.

G. S. Bari and K. I. Matveev, “Hydrodynamics of single-deadrise hulls and their catamaran configurations,” International Journal of Naval Architecture and Ocean Engineering, vol. 9, no. 3, 2017, doi: 10.1016/j.ijnaoe.2016.11.001.

M. Insel and A. F. Molland, “An Investigation Into Resistance Components of High Speed Displacement Catamarans,” RINA, vol. 134, 1992.

A. Farkas, N. Degiuli, and I. Martić, “Numerical investigation into the interaction of resistance components for a series 60 catamaran,” Ocean Engineering, vol. 146, pp. 151-169, 2017, doi: 10.1016/j.oceaneng.2017.09.043.

ITTC, “ITTC – Recommended Procedures Testing and Extrapolation Methods Resistance Test,” Int. Towing Tank Conf., 2002.

T. Armstrong, “The Effect Of Demihull Separation On The Frictional Resistance Of Catamarans,” in FAST 2003 The 7th International Conference on Fast Sea Transportation, 2003.

C. L. Ford and P. M. Winroth, “On the scaling and topology of confined bluff-body flows,” Journal of Fluid Mechanics, vol. 876, pp. 1018-1040, 2019, doi: 10.1017/jfm.2019.583.

I. K. A. P. Utama, “Investigation of the viscous resistance components of catamaran forms,” University Of Southampton (United Kingdom), 1999.

H. Glauert, “Wind Tunnel Interference on Wings, Bodies and Airscrews,” Aeronaut. Res. Comm. Reports Memo. No. 1566, no. 1566, 1933.

ESDU, 80024, "Blockage Corrections for Bluff Bodies in Confined Flows,” 1980.

R. B. Luhulima, I. K. A. P. Utama, and A. Sulisetyono, “Experimental Investigation into the Resistance Components of Displacement Trimaran at Various Lateral Spacings,” International Journal of Engineering Research & Science, vol. 2, no. 7, pp. 2395–6992, 2016.




Copyright (c) 2020 Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan

License URL: http://creativecommons.org/licenses/by-sa/4.0