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A parametric study for a flettner rotor in standalone condition using CFDopen accessA parametric study for a flettner rotor in standalone condition using CFD

Other Titles
A parametric study for a flettner rotor in standalone condition using CFD
Authors
권창섭연성모김유철김연규Kim Yun Ho강희진
Issue Date
12월-2022
Publisher
대한조선학회
Keywords
Flettner rotor; CFD; Scale; Aspect ratio; Disk; y+
Citation
International Journal of Naval Architecture and Ocean Engineering, v.14, pp 1 - 11
Pages
11
Journal Title
International Journal of Naval Architecture and Ocean Engineering
Volume
14
Start Page
1
End Page
11
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/9433
DOI
10.1016/j.ijnaoe.2022.100493
ISSN
2092-6782
2092-6790
Abstract
In this study, the performance prediction and parametric study of a Flettner rotor in standalone condition was conducted based on a Computational Fluid Dynamics (CFD) approach. A method for predicting the rotor performance based on steady RANS simulation was established, and the present method was validated with a reference rotor model in which wind tunnel test results were published. The CFD results depending on the turbulence models including k-omega shear stress transport (SST), k-epsilon, Spallart- Almaras and Reynolds stress model, and the non-dimensional wall distance (yþ) as well as boundary conditions were compared with the experimental results. A model scale condition with a similar rotor diameter was considered to apply the CFD analysis method to the target rotor dimension. The CFD results based on the Reynolds number (Re) and y þ values were compared in the model scale. In addition, a comparative analysis was performed on the model and prototype size under the same Re condition. Consequently, an appropriate condition for the CFD analysis was proposed and the lift, drag, torque and energy efficiency of the target rotor design were predicted. Based on this, parametric investigations for the rotor aspect ratios from 4 to 6 and the diameter ratio of the disk and rotor cylinder from 1.5 to 8 were conducted. The effect of aspect ratio was examined by varying the rotor diameter while maintaining the height. Furthermore, the torque components generated by the rotor cylinder and disk owing to the aerodynamic load were analyzed.
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