The Resistance and EEDI Analysis of Trimaran Vessel with and without Axe-bow

Abstract

Efforts to reduce emission of toxic gases into the atmosphere by sea transportation have been consistently carried out by the International Maritime Organisation (IMO) since 2009. IMO has introduced a regime known as energy efficiency design index (EEDI) to monitor and quantify the emission of CO2 because of its global climate impact. A comparison was conducted between trimaran hull forms without and with Axe-Bow on the main-hull with S/L=0.3 and 0.4, as well as a comparison with a monohull of comparable displacement. The CFD method was used to analyse resistance. Overall, the trimaran without the Axe-Bow can decrease resistance by 22.6%, while the trimaran with the axe-bow can reduce resistance by 25.0%. Additionally, this resulted in a 54.8% decrease in EEDI on trimarans without axe-bow and a 55.4% reduction on trimaran equipped with axe-bow when compared to MV Sabuk Nusantara 104. In addition, despite little difference between trimaran with and without axe-bow, the introduction of axe-bow has shown apparent benefits to lower EEDI.

CFD Analysis into the Resistance Estimation of Hard-Chine Monohull using Conventional against Inverted Bows

“…𝜀 32 (7) where 𝜀 21 is different of estimation where is ratio of number of element medium to fine and 𝜀 32 is different of estimation where is ratio of number of elements fine to coarse.…”

“…Sutiyo and Utama [6] analysed the ship resistance characteristics of trimaran vessel with standard NPL 4a hullform and the use of Axe-Bow. The resistance analysis of trimaran vessel with and without Axe-Bow was also conducted by Luhulima et al, [7]. Su et al, [8] studied hydrodynamics performance including resistance of planning trimaran with a Wave-Piercing bow.…”

Reconstruction of Hull Form of Traditional Croatian Fishing Vessel and Prediction of Eff ective Power

“…Lately, a huge potential of accurate and reliable methods based on Computational Fluid Dynamics (CFD), as an alternative to towing tank experiments, has been proven for the prediction of ship resistance and eff ective power [18]. There are numerous studies in the literature based on the application of CFD for various problems in ship hydrodynamics [19,20,21].…”