Linear discretized lifting-line
–Derive and validate a physics-based model to simulate the gross effects of gap-clearance flow on a hydrofoil
–Validate predictions of hydrodynamic response of a rectangular cantilevered hydrofoil in a flow channel
–Elucidate upon the effects of changing gap-clearance size
–Gap flow model validated against experimental results and higher-fidelity CFD simulations by the author.
–Increasing gap size decreases 3D lift and increases 3D drag.
–The result is a fast and accurate model capable of predicting global lift, drag, circulation distributions, TLV strength, and incipient TLV cavitation with 6 orders-of-magnitude time-savings, compared to CFD.
–Discretized lifting-line model derived from first-principles
–Empirical results found in literature were used as a modified boundary condition at wing tip
Nonlinear lifting-line formulation.
–Extend the capabilities of discrete lifting-line code of (Harwood & Young, 2014) to predict load distributions on surface-piercing hydrofoils
–Implement unsteady-flow capability
–Section-level nonlinear lift models:
–Negative image FSBC
–Wagner-function convolution approach is a reasonable, but high-cost, approach to unsteady simulations