Browsing by Author "Bomberg, Daniel"
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Item Dynamic pressure distribution on a marine multi-component ducted propulsion system(2017-10-30) Bomberg, Daniel; Siikonen, Timo; Nuutinen, Mika; Insinööritieteiden korkeakoulu; Tuhkuri, JukkaDifferent computation approaches are studied to find an approach that is suitable for computations of a new marine propulsion unit, called the Azipod® XL by ABB, which features linear flow propulsion technology. The chosen approach is used to compute and compare three versions of the unit, which differ in terms of propeller and stator vane design. Attention is paid to pressure distributions, rotor-stator interaction and tip leakage flow. The STAR-CCM+ software is used for the computations, where the RANS equations are used and turbulence is modelled using two versions of the SST k−omega turbulence model. The rotation of the propeller is enabled using sliding interfaces between the rotating and stationary mesh regions. Cavitation is not modelled in this study. An improved approach was found regarding the computation mesh, which has a fairly big impact on the results compared to the approach used previously. Potential for improvements in the design of the unit was also found.Item Turbulenssin käsittelyn pääperiaatteet virtauslaskennassa(2014-04-28) Bomberg, Daniel; Siikonen, Timo; Insinööritieteiden korkeakoulu; Mikkola, Tommi