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Figure 5: Velocity contours upstream of the propeller during one revolution; the time sequence runs alphabetically (a) through (h)
  
From:
Application: Simulation of Unsteady Propeller Blade Loads Using OpenFOAM
Posted Fri June 13, 2014 @02:44PM
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Application By Prof. Rickard E. Bensow
Department of Shipping and Marine Technology
Chalmers University of Technology
Gothenburg, Sweden

Unsteady propeller blade loads are important to consider in the design of the propulsion system in order to avoid problems with noise and vibrations. This is normally done through an analysis of the average wake field flowing into the propulsor in order to correctly match the different components of the propulsion system. As computational resources increase, it starts to become possible to better study the impact on the natural wake flow unsteadiness and how this influences the behavior of the propeller.

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