Publikasjoner og ansvarsområder
The ship and the new supply chain
Numerical analysis of azimuth propulsor performance in seaways: Influence of oblique inflow and free surface
In the present work, a generic ducted azimuth propulsor, which are frequently installed on a wide range of vessels, is subject to numerical investigation with the primary focus on performance deterioration and dynamic loads arising from the influence of oblique inflow and the presence of free surfac...
Numerical Study of Propeller Ventilation
This paper presents a numerical study of the ventilation phenomenon based on model tests of a pushing thruster with variable advance ratios at a constant immersion depth to radius ratio h/R=1.6. This study uses STAR-CCM+, a commercial CFD code which uses a VOF formulation (Volume Of Fluid) in order ...
Analysis of Dynamic Loads on Azimuthing Ducted Propulsor under Off-Design Operation Conditions
In the present study, the results of CFD simulations by the unsteady RANS method of the flow around a generic model of azimuthing ducted pushing thruster are presented and compared with the results of model tests. The calculations are performed with the propeller operating at the design pitch (P0.7/...
A data integration technique for monitoring the performances of a vessel in operation
The paper deals with the topic of monitoring the performances of a vessel in service in order to establish whether fouling of the hull have worsened the hydrodynamic efficiency of the ship. In the paper the aspects of acquisition, treatment and presentation of the data are discussed. Particular focu...
Numerical and Experimental Investigation of Roughness Due to Different Type of Coating
Effect of roughness on frictional resistance is investigated experimentally and numerically. Resistance tests are performed with several plates coated with different paints, which have different roughness. Front plate is 4 m long and aft plates are 6 m long resulting in a total hydrodynamic length o...