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Advanced
Analysis > Computational Fluid
Dynamics
Wave
pattern around a high speed,
160m trimaran
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Visualization
of a Patrol Vessel in an irregular seaway |
By using advanced computational fluid dynamics (CFD) methods,
Aker Yards Marine (AYM) can optimize
hull designs early in the design spiral, before detailed design
has taken place. This reduces the required number of model tests,
substantially reducing the cost of hull form optimization. This
also allows AYM to seek optimum designs
and arrangements without the expense of model making.
Resistance and Hull Form Optimization
Utilizing both potential flow codes and Reynold’s Averaged Navier
Stokes (RANS) solvers, AYM can optimize
complete hull designs in a time efficient manner. CFD
methods provide a cost effective means to evaluate several different
hull forms at the early design stage, without incurring the
expense of model testing.
Seakeeping
As a result of our participation
in the MARIN
Cooperative Research (CRS) program, AYM
has access to a couple of advanced seakeeping programs that
are currently under development by MARIN. By making use
of these state-of-the-art 3-D potential flow seakeeping codes,
PRECAL and PRETTI, we can offer accurate seakeeping predictions
for a wide variety of hull forms including monohulls, SWATHs
and trimarans.
These software tools also improve our ability to calculate
the structural loads imposed on ships in a seaway and enable
AYM to conduct a completely non-linear
time domain analysis of the ship’s motions and structural loads.
Real time visualizations of seakeeping predictions provide our
clients with accurate representations of the motions of their
designs in any sea state.
Ventilation and Exhaust
Exhaust
flows on the exterior deck of a cruise ship, automobile emissions
the car deck of a ferry, or ventilation in a ship’s engine room
are all important safety and comfort issues for passengers and
crew. CFD provides valuable, minimum cost solutions to
model any exhaust or ventilation problem.
Appendage Design
Proper appendage
design and alignment, while historically considered too expensive
relative to the reduction in operating costs, can now be rapidly
modeled with CFD software, and is a fast, value added process
with our designs.
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CFD
Engine room heating model
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Propeller Design
Accurate prediction
of the propeller wake field, and flow separation at the stern,
are important parameters in propeller optimization. Both
can be more accurately modeled with RANS software, than by any
previous theoretical or practical experimental means.
AYM uses the Reynold’s Averaged Navier
Stokes (RANS) solvers StarCD,
Comet, Star CCM+ and Star Design. These powerful software
tools allow accurate modeling of virtually any conceivable fluid
flow: static, transient, free surface, chemical mixtures, fluid
impacts, etc. Star CCM+ and Comet are both well validated
for marine hydrodynamics.
Additionally, AYM makes use of various
potential flow codes to evaluate seakeeping and hull resistance.
AYM has the experience and resources
to provide effective engineering design and analysis for all
your marine fluid flow problems.
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