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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 Paper |
Files in This Item:
File | Description | Size | Format | |
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Scaling of RV Athena’s Appendage Drag Using CFD.pdf | 106.13 kB | Adobe PDF | View/Open Request a copy |
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