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In the current paper, a particular leading-edge form called Step-Shaped Leading-Edge (SSLE) is studied in continuous and non-continuous forms along the span of an infinite wing based on, via the RANSE scheme. The computed lift and drag coefficients are in good agreement with experimental data up to an angle of attack of, i.e. the stall angle of the baseline model. This study shows that although the continuous SSLE lowers the stall angle at 12, the non-continuous SSLE increases it up to. The flow visualisation over the studied models has clearly illustrated how the SSLE alter the flow pattern over a hydrofoil. The model with non-continuous SSLE has lift and drag coefficient diagrams similar and even better in some angles of attack than hydrofoils with sinusoidal leading edge. Furthermore, to bring order into the chaos and score different leading-edge forms, a quantitative and visualising rating technique is proposed.

Numerical investigation of the effects of continuous and non-continuous SSLEs on hydrofoils at different AoAs and their impact on the stall angle