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    Alimirzazadeh, Siamak Roshan, Saeed Zabihzade and Seif, Mohammad Saeed 2016. Unsteady RANS simulation of a surface piercing propeller in oblique flow. Applied Ocean Research, Vol. 56, p. 79.

    Yari, Ehsan and Ghassemi, Hassan 2016. Hydrodynamic analysis of the surface-piercing propeller in unsteady open water condition using boundary element method. International Journal of Naval Architecture and Ocean Engineering, Vol. 8, Issue. 1, p. 22.

    Young, Yin Lu and Savander, Brant R. 2011. Numerical analysis of large-scale surface-piercing propellers. Ocean Engineering, Vol. 38, Issue. 13, p. 1368.

  • Journal of Fluid Mechanics, Volume 151
  • February 1985, pp. 311-335

A performance-prediction theory for partially submerged ventilated propellers

  • Okitsugu Furuya (a1)
  • DOI:
  • Published online: 01 April 2006

A partially submerged propeller theory was developed by employing a singularity distribution method. Unsteady pressure doublets and pressure sources represented the blade camber and blade-and-cavity thickness respectively. The induced velocities were derived by reducing the formula to a lifting-line configuration. The free-surface effect was considered by use of the image method. The induced velocities contained the singular integrals of 5th order, which are usually numerical unstable. An effort was made to derive numerically stable formulae from these singular equations by applying a method similar to the induction-factor method of Morgan & Wrench (1965) and Lerbs (1952) used for steady-state fully wetted propeller problems. These new formulae are not only applicable to the present partially submerged ventilated propeller problem, but also to general unsteady subcavitating and cavitating propeller problems such as propeller starting-up and non-periodic loading problems. By combining the two-dimensional water entry-and-exit theory of Wang (1979), the thrust and torque coefficients were calculated for representative partially submerged propellers and favourably compared with the experimental data.

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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
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