Assessment of appendage effect on forward resistance reduction

Authors

  • Marcos Salas University Austral of Chile
  • Gonzalo Tampier University Austral of Chile

DOI:

https://doi.org/10.25043/19098642.82

Keywords:

forward resistance, appendages, numerical tests, experimental tests, CFD, towing tank

Abstract

This paper shows experimental and numerical results of three types of appendages on forward resistance reduction of displacement and semidisplacement hulls. Forward resistance results were obtained by using Computational Fluid Dynamics and towing tank tests. The appendages evaluated are stern flaps and interceptors for displacement hulls and spray railspray rails for a semiplaning hull. The experiments are independent from each other and no research was undertaken to include the combined effect of appendages on a single hull. The predicted reduction in forward resistance in all three tested devices is around 5-10%, showing potential for fuel saving through the evaluation of hydrodynamic effects of energy saving appendages.

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Author Biographies

Marcos Salas, University Austral of Chile

University Austral of Chile, Faculty of Engineering Sciences. Valdivia, Chile.

Gonzalo Tampier, University Austral of Chile

University Austral of Chile, Faculty of Engineering Sciences. Valdivia, Chile.

References

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BERTRAM, VOLKER (2011). “Practical Ship Hydrodynamics”. Butterworth-Heinemann. Second Edition.

CUSANELLI, D., KARAFIATH, G., AND LIN, CHENG WEN (1999). “Stern Wedges and Stern Flaps for Improved Powering Performance – U.S. Navy Experience”, SNAME Annual Meeting, Sept. 29 – Oct 2, 1999, Baltimore, M.D.

DÍAZ, JORGE (2012). “Comparación Numérica de Dispositivos de Reducción de Resistencia al Avance en una Embarcación de Semi-Desplazamiento”. Universidad Austral de Chile, 2009.

ETSIN (2002). “Estudio de optimización hidrodinámicas de las formas de una serie de buques pesqueros de casco de PRFV” . Proyecto N° 0104. Canal de Ensayos Hidrodinámicos E.T.S.I.N., UPM, 02 de abril 2002.

FERZIGER, J. H.AND PERIC, M. (2002). “Computational Methods for Fluid Dynamics.” 3rd edition, Springer, 2002.

JIMÉNEZ, PATRICIO (2009). "Análisis experimental de una serie de flaps de popa en unidad de desplazamiento". Universidad Austral de Chile, 2009.

MILLWARD, A. (1976). “Effect of Wedges on the Performance Characteristics of Two Planing Hulls”, Journal of Ship Research, Vol. 20, No. 4, Dec. 1976.

MULLER-GRAF, BURKHARD (1991). The effect of an advanced spray rail system on resistance and development of spray of semi-displacement round bilge hulls. FAST 91. First International Conference on Fast Sea Transportation, Trondheim, Norway, June 1991.

SALAS, M.; ROSAS, J. AND LUCO, R. (2004). “Hydrodynamic Analysis of the Performance of Stern Flaps in a Semi-Displacement Hull”. Latin American Applied Research. Vol. 34.

SEPÚLVEDA, PATRICIO (2006). “Diseño de interceptores en pesqueros utilizando pruebas experimentales y códigos CFD”, E.T.S.I.N., Abril 2006.

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Published

2013-07-30

How to Cite

Salas, M., & Tampier, G. (2013). Assessment of appendage effect on forward resistance reduction. Ship Science & Technology, 7(13), 37–45. https://doi.org/10.25043/19098642.82

Issue

Vol. 7 No. 13

Section

Scientific and Technological Research Articles

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