Advanced CFD and Optimization solutions for Hydro Engineering0 pages

A new w

ave in Fluid Dynamics

Advanced CFD and
Optimization solutions
for Hydro Engineering
Non Linear Harmonic
Method: A Major Breakthrough in
Unsteady CFD simulations
• Accurate

Rotor/Stator interactions
• Single passage mesh simulations
• Accurate unsteady solution with low
number of harmonics (Blade Passing
Frequencies)
• Reconstruction in time of the solution

Non-Linear Harmonic

Sliding Grid

900,000
1.5Gb
500
5

15.000,000
7.5Gb
40,000
>1000

Mesh size
RAM
Iterations
CPU Time w.r.t.
Steady Mixing Plane

CPU cost comparison for Non-Linear Harmonic and Sliding
Grid simulations w.r.t. steady Mixing Plane simulations

Instantaneous static pressure
distribution on runner shroud
Comparison
of Non-Linear
harmonic and
sliding grid
simulation:
instantaneous
blade pressure
distribution
and pressure
fluctuation
amplitude
through FFT

Also available in FINE™/Turbo and
FINE™/Hexa:
• Steady Mixing Plane and Frozen Rotor
• Unsteady Sliding Grid
• Unsteady Phase-Lagged

Advanced Developments for Better Products
www.numeca.com www.numiberica.com
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10/19/2009, 6:45 PM