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Article

Time Domain Modeling of Propeller Forces due to Ventilation in Static and Dynamic Conditions

1
SINTEF Ocean, Otto Nielsens vei 10, 7052 Trondheim, Norway
2
Kongsberg University Technology Centre “Performance in a Seaway” at NTNU, N-7491 Trondheim, Norway
3
Department of Marine Technology, Faculty of Engineering Science and Technology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(1), 31; https://doi.org/10.3390/jmse8010031
Received: 5 November 2019 / Revised: 19 December 2019 / Accepted: 23 December 2019 / Published: 9 January 2020
This paper presents experimental and theoretical studies on the dynamic effect on the propeller loading due to ventilation by using a simulation model that generates a time domain solution for propeller forces in varying operational conditions. For ventilation modeling, the simulation model applies a formula based on the idea that the change in lift coefficient due to ventilation computes the change in the thrust coefficient. It is discussed how dynamic effects, like hysteresis effects and blade frequency dynamics, can be included in the simulation model. Simulation model validation was completed by comparison with CFD (computational fluid dynamics) calculations and model experiments. Experiments were performed for static and dynamic (heave motion) conditions in the large towing tank at the SINTEF Ocean in Trondheim and in the Marine Cybernetics Laboratories at NTNU (Norwegian University of Science and Technology). The main focus of this paper is to explain and validate the prediction model for thrust loss due to ventilation and out of water effects in static and dynamic heave conditions. View Full-Text
Keywords: intermittent ventilation; vortex ventilation; thrust loss; lift coefficient; propeller simulation model intermittent ventilation; vortex ventilation; thrust loss; lift coefficient; propeller simulation model
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MDPI and ACS Style

Kozlowska, A.M.; Dalheim, Ø.Ø.; Savio, L.; Steen, S. Time Domain Modeling of Propeller Forces due to Ventilation in Static and Dynamic Conditions. J. Mar. Sci. Eng. 2020, 8, 31. https://doi.org/10.3390/jmse8010031

AMA Style

Kozlowska AM, Dalheim ØØ, Savio L, Steen S. Time Domain Modeling of Propeller Forces due to Ventilation in Static and Dynamic Conditions. Journal of Marine Science and Engineering. 2020; 8(1):31. https://doi.org/10.3390/jmse8010031

Chicago/Turabian Style

Kozlowska, Anna M., Øyvind Ø. Dalheim, Luca Savio, and Sverre Steen. 2020. "Time Domain Modeling of Propeller Forces due to Ventilation in Static and Dynamic Conditions" Journal of Marine Science and Engineering 8, no. 1: 31. https://doi.org/10.3390/jmse8010031

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