Til hovedinnhold

Analysis of Dynamic Loads on Azimuthing Ducted Propulsor under Off-Design Operation Conditions

Analysis of Dynamic Loads on Azimuthing Ducted Propulsor under Off-Design Operation Conditions

Kategori
Konferansebidrag og faglig presentasjon
Sammendrag
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/D=1.1) for different advance coefficients in straight and oblique flow conditions. The main quantities considered in the validation study include propeller thrust and torque, duct thrust and side force, total thrust and total side force as well as the thruster steering moment. In addition, the loads acting on a single propeller blade are also compared to the experimental data. A good agreement between the calculations and measurements is achieved for most quantities except the steering moment that shows larger relative differences from the measured values. However, the overall variation of the steering moment with loading and heading angle appears to be qualitatively captured by the numerical simulations. Separately, CFD simulations are performed with the same thruster operating in presence of initially undisturbed free surface, at different magnitudes of submergence, in order to illustrate the impact on propulsor forces and individual blade loads.
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • SINTEF Ocean / Skip og havkonstruksjoner
Presentert på
Fifth International Symposium on Marine Propulsors smp’17
Dato
11.06.2017 - 14.06.2017
År
2017