sophisticated assessment


to flow separation and the generation of vortices in areas where they could negatively influence efficiency and vibrations. Similar to the aforementioned analysis, different loading and water depth conditions were examined in accordance with the selected matrix of operational conditions.


The innovative hull design passed the test with very good results, in both deep and shallow water. At the time of writing this article the final validation by means of model tests was about to start. During this stage, the performance of the hull will again be investigated in deep and shallow water.


deep water


geometry should not be too complex. The PARNASSOS tool has therefore been used in the first stages of the aft body assessment, where the hull was not yet equipped with the tunnel head box combination. The flow characteristics obtained in this way, were used to align the tunnel head box combina- tion with the flow (see picture).


In the next stage, when the aligned tunnel head box combination was fitted to the hull, the hull was examined again, but now the geometry had become so complex that a viscous flow code, which is capable of solv- ing unstructured meshes had to be used. Therefore, for this stage, MARIN’s code ReFRESCO was applied. The calculated flow characteristics were examined with respect


shallow water


Assessment of initial aft body using PARNASSOS (pressure distribution on the hull) in deep water and shallow water


report


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