Analysis of propeller wake field and vortical structures using k−ω SST Method

By M. Heydari, Hamid Sadat-Hosseini. 2020

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Abstract CFD simulations are conducted to study the wake field behind a marine propeller in open water conditions at various advance coefficients. The local variables (velocity, pressure) and the wake structure characteristics are analyzed extensively using mean, Root Mean Square (RMS) and Fourier analysis of data. The integral variables (forces/moments) and their correlations with local variables are also investigated. Additionally, the iterative and grid verification studies are conducted to evaluate numerical uncertainty of the simulations. The results showed good agreement between the integral variables obtained by the simulations and those of experiments available in the literature, which confirmed the validity of the computational method employed in this work. Fourier analysis studies on integral variables showed that the rotation of the whole propeller determines the fluctuation of side forces at high J, while at low J, mostly rotation of individual blades affects the side forces. The local flow studies suggested strong correlation between the advance coefficient and the characteristics of vortical structures including their formations, trajectories, and stabilities.

Subfields: Computational Mechanics, Mechanics of Materials, Ocean Engineering

View Paper: https://www.semanticscholar.org/paper/66fbcaeb7a39744b9e163902fd4bdb44c1c7254d