On the Selection of Optimal Propeller Diameter for a 120m Cargo Vessel
Paper i proceeding, 2018

In the preliminary design of a propulsion unit the selection of propeller diameter is most commonly based on open water tests of systematic propeller series. The optimum diameter obtained from the propeller series data is however not considered to be representative for the operating conditions behind the ship, instead a slightly smaller diameter is often selected. We have used computational fluid dynamics (CFD) to study a 120m cargo vessel with an integrated rudder bulb-propeller hubcap system and a 4-bladed propeller series, to increase our understanding of the hydrodynamic effects influencing the optimum. The results indicate that a 3-4 % smaller diameter is optimal in behind conditions in relation to open water conditions at the same scale factor. The reason is that smaller, higher loaded propellers perform better together with a rudder system. This requires that the gain in transverse kinetic energy losses thanks to the rudder overcomes the increase in viscous losses in the complete propulsion system

Författare

Jennie Andersson

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Robert Gustafsson

Rolls-Royce (Swe)

Arash Eslamdoost

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

SNAME 15th Propeller and Shafting Symposium, PSS 2018

SNAME 15th Propeller and Shafting Symposium, PSS 2018
Norfolk, United Kingdom,

Analys och optimering av marina propulsionssystem

Rolls-Royce (Swe), 2014-10-06 -- 2017-09-30.

Energimyndigheten (38849-1), 2014-10-06 -- 2017-09-30.

Ämneskategorier

Teknisk mekanik

Farkostteknik

Strömningsmekanik och akustik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.5957/PSS-2018-11

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Senast uppdaterat

2021-11-05