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J. Mar. Sci. Eng. 2018, 6(1), 27; https://doi.org/10.3390/jmse6010027

Prediction of the Open-Water Performance of Ducted Propellers with a Panel Method

1
Department of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais 1, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2
Maritime Research Institute Netherlands, 2 Haagsteeg, 6708 PM Wageningen, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 16 January 2018 / Revised: 21 February 2018 / Accepted: 11 March 2018 / Published: 19 March 2018
(This article belongs to the Special Issue Marine Propulsors)
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Abstract

In the present work, a comparison between the results obtained by a panel code with a Reynolds-averaged Navier-Stokes (RANS) code is made to obtain a better insight on the viscous effects of the ducted propeller and on the limitations of the inviscid flow model, especially near bollard pull conditions or low advance ratios, which are important in the design stage. The analysis is carried out for propeller Ka4-70 operating inside duct 19A. From the comparison, several modelling aspects are studied for improvement of the inviscid (potential) flow solution. Finally, the experimental open-water data is compared with the panel method and RANS solutions. A strong influence of the blade wake pitch, especially near the blade tip, on the ducted propeller force predictions is seen. A reduction of the pitch of the gap strip is proposed for improvement of the performance prediction at low advance ratios. View Full-Text
Keywords: ducted propeller; panel method; wake model; RANS comparison ducted propeller; panel method; wake model; RANS comparison
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Baltazar, J.M.; Rijpkema, D.; Falcão de Campos, J.; Bosschers, J. Prediction of the Open-Water Performance of Ducted Propellers with a Panel Method. J. Mar. Sci. Eng. 2018, 6, 27.

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