Izvorni znanstveni članak
https://doi.org/10.21278/brod69302
FREE SURFACE FLOW SIMULATION AROUND AN APPENDED SHIP HULL
Yavuz Hakan Ozdemir
; Canakkale Onsekiz Mart University, Department of Motor Vehicles and Transportation Technologies, Canakkale, Turkey
Baris Barlas
; Istanbul Technical University, Department of Naval Architecture and Marine Engineering, Istanbul, Turkey
Sažetak
This study brings forward the results of previously published work of free surface flow simulation around a fast ship model. Experimental measurements and numerical simulations of a fast bare-hull ship model form are now extended to the same ship form with appendices for a wide range of Froude numbers. The governing equations are discretized by means of an unstructured finite volume mesh. The standard k-ε turbulence model and Volume of Fluid Method to capture the two phase media are used. The total resistance, due to wave and wake fields of the ship model with appendages and the resistance of the appendages alone are calculated numerically, and compared with the experiments. The experiments and computations were performed for 11 different Froude numbers between 0.103 and 0.322. For Froude numbers up to 0.25, numerical simulations found to be quite in agreement with the experiments. It has been found that appendages increase the total drag mainly by increasing the pressure resistance, and the effect of the appendages becomes more important as the flow speed gets higher.
Ključne riječi
Computational Fluid Dynamics; Experiment; Turbulent free surface flows; Appendages, k-ε turbulence model
Hrčak ID:
197096
URI
Datum izdavanja:
30.9.2018.
Posjeta: 1.580 *