Energy balance analysis of a propeller in open water
Artikel i vetenskaplig tidskrift, 2018

This paper proposes a methodology based on control volume analysis of energy, applied on Computational Fluid Dynamics (CFD) results, for analyzing ship propulsion interaction effects as a complement to the well-established terminology, including thrust deduction, wake fraction and propulsive efficiency. The method, titled Energy Balance Analysis, is demonstrated on a propeller operating in open water. Through consideration of a complete energy balance, including kinetic energy flux, turbulent kinetic energy flux, internal energy flux (originating from dissipation) and pressure work, all possible hydrodynamic losses are included in the analysis, implying that it should be possible to avoid sub-optimized solutions. The results for different control volumes and grid refinements are compared. The deviation of the power obtained from the proposed energy balance analysis relative to the power based on integrated forces on the propeller is less than 1%. The method is considered promising for analyzing and understanding propulsor hull interaction for conventional, as well as novel propulsion configurations. The energy balance analysis is conducted as a post-processing step and could be used in automated optimization procedures.

Reynolds transport theorem

Hydrodynamic losses

RANS

Propeller in open water

Energy balance

Författare

Jennie Andersson

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Arash Eslamdoost

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Alexandre Capitao Patrao

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Marko Hyensjö

Rolls-Royce (Swe)

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Ocean Engineering

0029-8018 (ISSN)

Vol. 158 162-170

Analys och optimering av marina propulsionssystem

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

Energimyndigheten, 2014-10-06 -- 2017-09-30.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Farkostteknik

Strömningsmekanik och akustik

DOI

10.1016/j.oceaneng.2018.03.067

Mer information

Senast uppdaterat

2018-08-28