Propulsive performance of a rigid wingsail with crescent-shaped profiles
Artikel i vetenskaplig tidskrift, 2023

Wind-assisted ship propulsion is considered an effective method for reducing greenhouse gas emissions. This paper presents numerical analyses of the aerodynamics of a single rigid wingsail conducted using the unsteady Reynolds-averaged Navier–Stokes (uRANS) equations. The wingsail is designed with a new sectional profile: a crescent-shaped foil. This new profile and the classical NACA 0015 profile were compared. Simulations were performed in two and three dimensions, with a focus on key physical quantities such as the external loads on the wingsail, the flow field, and the propulsive performance. It is concluded that the wingsail with the crescent-shaped section has higher propulsion efficiency than the NACA 0015. However, stronger flow separation was detected for the crescent-shaped section. As the separation deteriorates, the flow unsteadiness, challenges the strength and stability of the wingsail structure. The three-dimensional simulations of both profiles, particularly NACA 0015, show that the tip vortices induced from the side edge of the wingsail account for substantial negative effects on the propulsion performance. A case study revealed that installing a wingsail with a crescent-shaped profile reduced fuel consumption by 9% compared with no wingsail.

Unsteady RANS

Rigid wingsail

Wind-assisted ship propulsion

Crescent-shaped profile

High Reynolds number


Heng Zhu

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Huadong Yao

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Fabian Thies

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Jonas Ringsberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Bengt Ramne


Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Ocean Engineering

0029-8018 (ISSN)

Vol. 285, part 2 1-22 115349

WINDSTRUC - vindassisterad framdrift för stora fartyg

ScandiNAOS AB, 2020-12-01 -- 2023-11-30.

Energimyndigheten (51552-1), 2020-12-01 -- 2023-11-30.

Stena Rederi AB, 2020-12-01 -- 2023-11-30.

Strategiskt forskningsprojekt på Chalmers inom hydro- och aerodynamik

Stiftelsen Chalmers tekniska högskola, 2019-01-01 -- 2023-12-31.


Hållbar utveckling

Innovation och entreprenörskap





Teknisk mekanik


Strömningsmekanik och akustik


Grundläggande vetenskaper


C3SE (Chalmers Centre for Computational Science and Engineering)



Mer information

Senast uppdaterat