During ice-breaking navigation, a massive amount of crushed ice blocks with different sizes is accumulated under the hull of an ice-going ship. This ice slides into the flow field in the forward side of the podded propulsor, affecting the surrounding flow field and aggravating the non-uniformity of the propeller wake. A pulsating load is formed on the propeller, which affects the hydrodynamic performance of the podded propulsor. To study the changes in the propeller hydrodynamic performance during the ice-podded propulsor interaction, the overlapping grid technique is used to simulate the unsteady hydrodynamic performance of the podded propulsor at different propeller rotation angles and different ice block sizes. Hence, the hydrodynamic blade behavior during propeller rotation under the interaction between the ice and podded propulsor is discussed. The unsteady propeller loads and surrounding flow fields obtained for ice blocks with different sizes interacting with the podded propulsor are analyzed in detail. The variation in the hydrodynamic performance during the circular motion of a propeller and the influence of ice size variation on the propeller thrust and torque are determined. The calculation results have certain reference significance for experiment-based research, theoretical calculations and numerical simulation concerning ice-podded propulsor interaction.
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Foundation item: The research was financially supported by the National Natural Science Foundation of China (Grant Nos. 51679052, 51639004 and 51809055) and the Defense Industrial Technology Development Program (Grant No. JCKY2016604B001) and the Natural Science Foundation of Heilongjiang Province of China (Grant No. E2018026).
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Guo, C., Xu, P., Wang, C. et al. Influence of Ice Size Parameter Variation on Hydrodynamic Performance of Podded Propulsor. China Ocean Eng 34, 30–45 (2020). https://doi.org/10.1007/s13344-020-0004-x
- podded propulsor
- ice-propeller interaction
- hydrodynamic load
- overlap grid