| Autor: |
Shin, Keun Woo, Andersen, Poul |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Shin, K W & Andersen, P 2017, CFD Analysis of Scale Effects on Conventional and Tip-Modified Propellers . in Proceedings of the Fifth International Symposium on Marine Propulsors-smp'17 . VTT Technical Research Centre of Finland, Fifth International Symposium on Marine Propulsors, Helsinki, Finland, 12/06/2017 . |
| Popis: |
Full-scale propeller performance is traditionally predictedby scaling model-scale test results, but the traditionalscaling methods do not take into account hydrodynamicdistinctions of tip-modified propellers in full-scaleperformance. An open-water CFD analysis is made onscale effects of tip-modified and conventional propellers,which are designed for the same operating condition withidentical propeller diameter and expanded area ratio.While model-scale computations are made with atransition model, a fully turbulent flow is modeled in the full-scale computations. The investigation on the effectsof the transition model shows that laminar and transitionalflow modeling is crucial in model-scale computations.Grid-independent solutions at model and full scale areachieved by grid verification studies.The CFD analysis of scale effects shows that theefficiency gain of the tip-modified propeller is increasedat full scale. The difference of scale effects between thetip-modified and conventional propellers is related toalterations of tip vortex and sectional pressuredistributions by the bent tip and the higher spanwiseloading at the tip region of the tip-modified propeller. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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