Comparison of Performance of Straight-and V-shaped Vanes Applied as Energy Saving Device to High-speed Boats

Ketut Suastika*, Ahmad Septiawan Saputra, Adnan Faiz Fauzi, Ahmad Firdhaus

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Hull Vane® is a device, generally utilizing a straight vane, installed horizontally near the stern of a vessel below the water surface and oriented in the transverse direction of the vessel with the purpose to save fuel consumption and to increase the vessel’s comfort. Because the bottom-hull form of a ship is generally curved, a non-straight vane may be more effective than a straight one when applied as Hull Vane®. The purpose of this study is to investigate the effectiveness of a V-shaped vane when applied as Hull Vane® on a 31 m high-speed crew boat. The study utilizes a computational fluid dynamics (CFD) method. CFD results show that the Hull Vane® decreased the bow-up trim of the boat, affected the boat’s wetted surface area, and decreased the height of the waves generated by the boat. The wave-height reduction due to the V-shaped Hull Vane® is larger than the straight Hull Vane®. Further, the Hull Vane® significantly reduced the total resistance of the boat at Froude number Fr = 0.34 with a larger reduction resulted from the V-shaped Hull Vane® (25.09% reduction for the straight vane and 30.75% reduction for the V-shaped vane). The observed resistance reduction decreased with increasing speed, ascribed to a too-large vane’s lift. The V-shaped Hull Vane® is more effective than the straight Hull Vane® in reducing the total resistance of the boat.

Original languageEnglish
Pages (from-to)110-122
Number of pages13
JournalCFD Letters
Volume15
Issue number10
DOIs
Publication statusPublished - Oct 2023

Keywords

  • Energy-saving device
  • High-speed boat
  • Hull Vane®
  • Straight vane
  • V-shaped vane

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