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Figure 29: Pressure Results ofa Propeller Simulation with Domain Size 4mx4mx20m
(widthxdepthxlength)
In this reduced simulation domain, there is much more pressure effect on the domain edge.
That means this domain size is not big enough for this propeller simulation. These
increased pressure effects will cause an error ofpropeller thrust prediction. Selecting a
simulation domain with little water pressure at the edge is a good choice for a propeller
simulation.
The simulation model provides water flow with a specific velocity to simulate ship
motion, which is the same function as the tow·tank carriage. This model also provides
propeller geometry. But, the model shown in figure 27 is not the same as a real
experiment. The propeller geometry is enlarged in figure 3D, so the difference is shown
clearly.
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