Analysis of Lift and Drag of Mono-foil Hysucat due to Longitudinal Foil-placement Variation

Ketut Suastika; Regi Y. Dikantoro; Dedi B. Purwanto; Dony Setyawan; Wing H. A. Putra

doi:10.12962/j25481479.v2i2.3655

Analysis of Lift and Drag of Mono-foil Hysucat due to Longitudinal Foil-placement Variation

Ketut Suastika, Regi Y. Dikantoro, Dedi B. Purwanto, Dony Setyawan, Wing H. A. Putra

Abstract

CFD simulations were conducted to study the effects of a hydrofoil and its relative placement in the longitudinal direction on the total resistance of a mono-foil hysucat (hydrofoil supported catamaran). Three foil positions were considered: (i) precisely below the vessel’s center of gravity, (ii) 3 chord-lengths aft from position 1 and (iii) 6 chord-lengths aft from position 1. At relatively low speed (volumetric Froude number FnV < 1.8), the hydrofoil results in an increase of the total resistance of the hysucat (up to 4.43%). At relatively high speed (FnV > 1.8), the hydrofoil results in a decrease of the total resistance (up to 34.86%). The resistance coefficient first increases, takes a maximum value and then decreases with increasing Froude number. The maximum value is observed at FnV ≈ 1.4 (or Fn ≈ 0.5), consistent with previous observations. The most optimum foil placement is that precisely below the center of gravity of the vessel.

Keywords

Catamaran; CFD; Hydrofoil; hysucat; Resistance

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DOI: http://dx.doi.org/10.12962/j25481479.v2i2.3655