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Investigating The Effect Of An Upstream Spheroid On Tandem Hydrofoils, Joel Tynan Guerra
Investigating The Effect Of An Upstream Spheroid On Tandem Hydrofoils, Joel Tynan Guerra
Master's Theses
This thesis documents a series of three dimensional unsteady Reynolds Averaged Navier-Stokes CFD simulations used to investigate the influence of an upstream prolate spheroid body on tandem pitching hydrofoils. The model is validated by performing separate CFD simulations on the body and pitching hydrofoils and comparing results to existing experimental data. The simulations were run for a range of Strouhal numbers (0.2-0.5) and phase differences (0-π). Results were compared to identical simulations without an upstream body to determine how the body affects thrust generation and the unsteady flow field.
The combined time-averaged thrust increases with Strouhal number, and is highest …