Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/25301
Title: Scaling of RV Athena’s Appendage Drag Using CFD
Authors: Mustaffa Kamal, Iwan
Rasahidan, Muhammad Safwan
Adenan Ahmed, Yaseen
UniKL MIMET
Keywords: Reynolds scale effect
Beta approach
Appendage drag
CFD
Issue Date: 28-Jan-2022
Abstract: The drag or the resistance contribution of appendages such as brackets, skegs, shafts, rudders and fin stabilizers fitted to R/V Athena were investigated. The issue in estimating the appendage drag is that laminar flows occurred at lower Reynolds number typically in ship model used for ship hydrodynamic testing in a towing tank. In full-scale ship, the flow is usually turbulent. Uncertainties when scaling the model result to full-scale may arise as the flow regime in both cases are not similar, hence the full-scale estimate will be inaccurate. One method to resolve this issue is to scale the appendage drag using a fixed fraction which is known as the ‘Beta’ approach. The aim of this investigation was to determine the value of beta. R/V Athena was chosen as the case study in this investigation. The results obtained from SHIPFLOW 6.3 shows that the drag in model scale increased at 14% when fully appended. The drag in full-scale increased at 11% when fully appended. It was observed that the skeg contributed to the highest percentage of drag at about 7–8% of the total drag. Finally, the value of beta was estimated to be in between 0.38 and 0.39.
Description: This article indexed by scopus
URI: http://hdl.handle.net/123456789/25301
ISBN: 978-981-15-0002-2
Appears in Collections:Conference Papers

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