Angle of attack impact on flow characteristics around finite-length rotating columns
Artikel i vetenskaplig tidskrift, 2024

The finite-length rotating column has been extensively studied because of its importance in various fields, such as marine and aerospace. In this study, the hydrodynamic performance of a finite-length rotating column with two free ends at different angles of attack is investigated using a large eddy simulation method. The effects of various geometries (including an equal-section cylinder and a variable-section truncated cone), incoming flow velocities, column rotation speeds, and angles of attack on the lift and drag characteristics and wake field of the rotating column are analyzed. The results reveal that a free end creates a concentrated tip vortex, which shortens the effective length that can generate the Magnus effect. Across different geometries and computational conditions, a relatively consistent lift coefficient is found for angles of attack from 60° to 120°, with the cone design significantly reducing the drag by approximately 10% for angles of attack from 120° to 150°. These findings provide valuable insights into the practical application of finite-length rotating columns. Specific recommendations for optimizing the design of these columns are suggested, including choosing appropriate geometries and considering the effects of incoming flow velocities and column rotation speeds.

transport

ocean engineering

Författare

Lin Jianfeng

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Shizhao Wang

Huadong Yao

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Yumin Su

Physics of Fluids

10706631 (ISSN) 10897666 (eISSN)

Vol. 36 065117

GEneric Multidiscaplinary optimization for sail INstallation on wInd-assisted ships (GEMINI)

Trafikverket (2023/32107), 2023-09-01 -- 2026-08-31.

Strategiskt forskningsprojekt på Chalmers inom hydro- och aerodynamik

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

Styrkeområden

Transport

Energi

Ämneskategorier

Beräkningsmatematik

Strömningsmekanik och akustik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1063/5.0209233

Mer information

Skapat

2024-06-08