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Numerical study of scale effect on the wake dynamics of a propeller

Lookup NU author(s): Shuai Sun, Professor Pengfei LiuORCiD



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


In this study, the effects of the scale on the evolution of propeller wake is simulated and analyzed under openwater conditions. The simulation is conducted using numerical techniques based on the detached eddy simulationmethod. The open water performance such as thrust and torque are analyzed for validation, and theinstantaneous flow field, vortical structure and the kinetic energy spectra are investigated for the scale effect onthe wake dynamics of a propeller. The results indicated that the influence of scale effect on load and wakedynamics of a propeller can differ significantly under different conditions. Under lighter loading condition, theaverage spanwise circulation at full-scale are considerably larger than those at model-scale at the range of innerradius, and the full-scale propeller exhibits a stronger blade shed vortex. Analysis of vortical structure shows thatthe transition-to-instability position of vortices vary under different conditions. Power spectral density analysis ofthe kinetic energy demonstrates that the kinetic energy of full-scale propellers is generally proportionally largerthan that of model-scale propellers.

Publication metadata

Author(s): Sun S, Wang C, Guo C, Zhang Y, Sun C, Liu P

Publication type: Article

Publication status: Published

Journal: Ocean Engineering

Year: 2020

Volume: 196

Print publication date: 15/01/2020

Online publication date: 09/12/2019

Acceptance date: 01/11/2019

Date deposited: 03/02/2020

ISSN (print): 0029-8018

ISSN (electronic): 1873-5258

Publisher: Elsevier


DOI: 10.1016/j.oceaneng.2019.106810


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