Izvorni znanstveni članak
https://doi.org/10.21278/brod68107
IMPACT OF SOME GEOMETRICAL ASPECTS ON THE TANDEM CO-ROTATING PROPELLER HYDRODYNAMIC CHARACTERISTICS
Boucetta Djahida
orcid.org/0000-0003-4912-3565
; Department of marine engineering, Faculty of mechanical engineering, University of Sciences and Technology of Oran, USTO, Oran, Algeria
Imine Omar
; Department of marine engineering, Faculty of mechanical engineering, University of Sciences and Technology of Oran, USTO, Oran, Algeria
Sažetak
In the present paper, a numerical simulation based on Kω-SST turbulence model has been carried out to determine the tandem propeller hydrodynamic characteristics in non-cavitating viscous flow by using the commercial code Fluent. As the first step, the numerical approach has been applied to the case of single propeller and the comparison with experiment results was in a good agreement. Next, the effects of axial and angular displacement as well as the diameter ratio between the tandem propellers have been investigated. This part of the study reveals that the tandem with idem propeller diameters is strongly recommended to assure more advantages. Furthermore, the tandem geometry corresponding to the axial displacement equal to 0.6D seems to be the best configuration and the open water performances remain almost unchanged with the variation of angular displacement. On the other hand, details of the mutual interaction between tandem propellers were also given by showing pressure contours, streamlines and thrust coefficient. Globally, this study illustrates the advantages of replacing single propellers by tandem solution.
Ključne riječi
marine propeller; tandem propellers; non-cavitating viscous flow; RANS method; hydrodynamic characteristics
Hrčak ID:
170156
URI
Datum izdavanja:
31.3.2017.
Posjeta: 2.077 *