Design, operation and analysis of wind-assisted cargo ships
Artikel i vetenskaplig tidskrift, 2020

This study presents a novel approach to analytically capture aero- and hydrodynamic interaction effects on wind-assisted ships. Low aspect ratio wing theory is applied and modified to be used for the prediction of lift and drag forces of hulls sailing at drift angles. Aerodynamic interaction effects are captured by analytically solving the Navier-Stokes equation for incompressible, potential flow. The developed methods are implemented to a 4 degrees-of-freedom performance prediction model called “ShipCLEAN”, including a newly developed method for rpm control of Flettner rotors on a ship to maximize fuel savings. The accuracy of the model is proven by model- and full-scale verification. To present the variability of the model, two case study ships, a tanker and a RoRo, are equipped with a total of 11 different arrangements of Flettner rotors. The fuel savings and payback times are assessed using realistic weather from ships traveling on a Pacific Ocean route (tanker) and Baltic Sea route (RoRo). The results verify the importance of using a 4 degrees-of-freedom ship performance model, aero- and hydrodynamic interaction and the importance of controlling the rpm of each rotor individually. Fuel savings of 30% are achieved for the tanker, and 14% are achieved for the RoRo.

wind-assisted propulsion

energy systems model

Flettner rotor

performance prediction

ship design

Författare

Fabian Tillig

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Jonas Ringsberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Ocean Engineering

0029-8018 (ISSN)

Vol. 211 1 107603

ShipCLEAN - Energieffektivare sjötransporter genom optimering av kopplade transportlogistik- och energisystemanalyser

Energimyndigheten, 2017-09-01 -- 2019-12-31.

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Styrkeområden

Transport

Energi

Ämneskategorier

Energiteknik

Meteorologi och atmosfärforskning

Farkostteknik

Energisystem

Strömningsmekanik och akustik

Marin teknik

Oceanografi, hydrologi, vattenresurser

Fundament

Grundläggande vetenskaper

DOI

10.1016/j.oceaneng.2020.107603

Mer information

Senast uppdaterat

2020-08-04