Application of Control Volume Energy Balance for Analysing Propeller-Hull Interaction in Presence of Free-surface
Paper in proceedings, 2019

Reynolds-Transport Theorem can be employed for analysing the conservation of energy equation over a control volume. Through this approach we can decompose the propeller delivered power into mechanical and thermal energy components. This approach not only enables us to qualitatively describe the flow but also makes it possible to quantify different energy flux components and understand the energy loss mechanisms within the studied system. Employing this method, the effect of free-surface on propeller-hull interaction is studied for an axisymmetric body in the vicinity of free-surface relative to a deeply submerged body. The required flow quantities for the control volume analysis are obtained from a Reynolds- Averaged Navier-Stokes approach together with a Volume-of-Fluid method for capturing the free-surface. The mechanical and thermal energy flux components have been computed for control volumes of different sizes, even including the free-surface. These results deviate less than 0.5% from the propeller delivered power which verifies the applicability of the method for further analysis of the interaction effects. The self-propelled hull is studied in two different depths and thus the propeller loadings and efficiencies are different. The analysis of energy flux components quantitatively explains the reasons for the differences.

energy equation

free-surface

propeller-hull interaction

Reynolds-Averaged Navier-Stokes

Author

Arash Eslamdoost

Chalmers, Mechanics and Maritime Sciences, Marine Technology

Jennie Andersson

Chalmers, Mechanics and Maritime Sciences, Marine Technology

Rickard Bensow

Chalmers, Mechanics and Maritime Sciences, Marine Technology

Marko Vikström

Kongsberg Hydrodynamic Research Centre

Sixth International Symposium on Marine Propulsors
Rome, Italy,

Analysis and optimisation of marine propulsion systems - part 2

Swedish Energy Agency, 2019-01-01 -- 2021-06-30.

Kongsberg Hydrodynamic Research Centre, 2019-01-01 -- 2021-06-30.

Driving Forces

Sustainable development

Areas of Advance

Transport

Subject Categories

Energy Engineering

Energy Systems

Fluid Mechanics and Acoustics

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

More information

Latest update

7/10/2019