The appendages’ influence on the hydrodynamic resistance of a sailing vessel

Dan Obreja; Mădălina Salcianu

Dan Obreja “Dunarea de Jos” University of Galati
Mădălina Salcianu “Dunarea de Jos” University of Galati

Keywords: sailing boat resistance, appendages influence, model tests.

Abstract

A comparative analysis on the hydrodynamic resistance of a sailing vessel with and without appendages was performed using both the experimental model tests results obtained in the Towing Tank of “Dunarea de Jos” University of Galati and the estimations based on the theoretical method proposed by Larson and Eliasson. The following appendages were included: the suspended rudder with large aspect ratio and the keel with additional weight (hydrodynamic profiled). The ITTC 1957 method was used to transpose the model results at full scale. The conclusions reveal the important influence of the appendages’ resistance and the large differences between the theoretical and experimental results.

References

[1]. Bertram, V., “Practical Ship Hydrodynamics”, Butterworth Heinemann, Oxford, 2000.
[2]. ITTC Recommended Procedures and Guidelines 7.5-02.02.01, “Testing and Extrapolation Methods. Resistance Test”, 23rd ITTC, 2002.
[3]. Larson, L., Eliasson, R.E., “Principles of yacht design”, International Marine, UK, 2000.
[4]. Obreja, C.D., Chirilă, T.A., “Preliminary computation of yacht resistance components using Delft series”, The Annals of “Dunarea de Jos” University of Galati, Fascicle XI - Shipbuilding, pp. 77-80, 2015.

The appendages’ influence on the hydrodynamic resistance of a sailing vessel

Abstract

References

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