Based on wing section design theory and boundary-layer calculations, a series of symmetrical hydrofoil sections with improved hydrodynamic characteristics in terms of cavitation inception was successfully developed and presented in a previous paper. The design method is applied to develop a series of nonsymmetrical hydrofoil sections having a minimum pressure bucket whose depth and width are adapted to practical applications. Its depth, namely, the bottom value of — Cpmin, is made as low as necessary to achieve a certain critical cavitation speed; its width is made as large as possible to tolerate fluctuations of large angles of attack. Hydrodynamic properties of these newly developed hydrofoil sections are compared with those of NACA 16 and NACA 66 (MOD). The ability to achieve significant delay in cavitation inception makes the present design method useful when applying it to hydrofoils as well as to marine propellers.

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