Forces and Velocity Measurements in Ship Propulsion Systems

  • João Pêgo
  • Hermann Lienhart
  • Franz Durst
  • Kay Tigges
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM) book series (NNFM, volume 96)


Pod drives are modern outboard ship propulsion systems with a motor encapsulated in a watertight pod. The motor’s shaft is connected directly to one or two propellers. The whole unit hangs from the stern of the ship and rotates azimuthally, thus providing thrust and steering. In the past decade pod drive propulsion has developed to be a reliable and serious alternative to conventional ship propulsion, especially for cruiser liners [1,2]. The overall efficiency of the system is determinant for the economical success of the vessel and for this reason it is necessary to improve the efficiency of the propulsor recurring to non-conventional solutions.


Axial Velocity Water Tunnel Tangential Velocity Component Axial Momentum Advance Ratio 
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  1. [1]
    F. A. Mewis: ”Pod drives-pros and cons”. HANSA-Schiffahrt-Schiffbau — Hafen, 2001, 138, 25–30.Google Scholar
  2. [2]
    J. Friesch: ”Investigations of podded drives in a large cavitation tunnel”. In PRADS 2001, Shangai, China, September 2001.Google Scholar
  3. [3]
    J. P. Pêgo: ”Advanced Fluid Mechanics Studies of Ship Propulsion Systems”. PhD thesis, Technische Fakultät Friedrich-Alexander Universität Erlangen-Nürnberg, 2007.Google Scholar
  4. [4]
    J. Pêgo, H. Lienhart, F. Durst, and O. Badran: ”Construction of a test facility for the research of ship propulsion systems”. Emirates Journal for Engineering Research, 2005, 10(2): 1–8.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • João Pêgo
    • 1
  • Hermann Lienhart
    • 2
  • Franz Durst
    • 2
  • Kay Tigges
    • 3
  1. 1.Faculdade de Engenharia da Universidade do PortoPortoPortugal
  2. 2.Lehrstuhl für Strömungsmechanik (LSTM)Universität Erlangen-NürabergErlangenGermany
  3. 3.Siemens AG, ATD IS 3HamburgGermany

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