Simulating of Ventilation in a Model Hydro-

Generator

Hamed Jamshidi

With OpenFOAM

2015-11-13 Gothenburg Region OpenFOAM Meeting 2

Hydro-Generator

2015-11-13 Gothenburg Region OpenFOAM Meeting 3

Generator Model

2015-11-13 Gothenburg Region OpenFOAM Meeting 4

Computational Domain

Rotor

Zone

Stator

Zone

2015-11-13 Gothenburg Region OpenFOAM Meeting 5

Steady Simulation

Multiple Reference Frames (MRF)

Stationary Frame

Steady-state Solver

Rotating Frame

MRF Source Term

simpleFoam + fvOptions in OpenFOAM

MRFSimpleFoam in FOAM-extend

In Each Rotating Zone;

1) Add the Coriolis Force to the Momentum Equation

2) Calculate the Flux From the Relative Velocity

2015-11-13 Gothenburg Region OpenFOAM Meeting 6

MRF Model

2015-11-13 Gothenburg Region OpenFOAM Meeting 7

Frozen Rotor Approach

2015-11-13 Gothenburg Region OpenFOAM Meeting 8

Frozen Rotor Results

1st

2nd

3rd

4th

2015-11-13 Gothenburg Region OpenFOAM Meeting 9

Mixing Plane Approach

1st

3rd

2015-11-13 Gothenburg Region OpenFOAM Meeting 10

Mixing Plane

2015-11-13 Gothenburg Region OpenFOAM Meeting 11

Simulation Vs. Experiment

1st

2nd

3rd

4th

2015-11-13 Gothenburg Region OpenFOAM Meeting 12

Velocity Field

2015-11-13 Gothenburg Region OpenFOAM Meeting 13

MRF Start up (FOAM-extend)

MRFZone.C

2015-11-13 Gothenburg Region OpenFOAM Meeting 14

MRF Start up (FOAM-extend)

MRFSimpleFoam.C

2015-11-13 Gothenburg Region OpenFOAM Meeting 15

MRF Start up (OpenFOAM)

fvOptions

2015-11-13 Gothenburg Region OpenFOAM Meeting 16

MRF Convergence

2015-11-13 Gothenburg Region OpenFOAM Meeting 17

MRFPimpleFoam

2015-11-13 Gothenburg Region OpenFOAM Meeting 18

MRFPimpleFoam

pimpleFoam.C

2015-11-13 Gothenburg Region OpenFOAM Meeting 19

MRFPimpleFoam Convergence

2015-11-13 Gothenburg Region OpenFOAM Meeting 20

Transient Simulation

Moving Mesh

Entire of the Domain

Ggi(FOAM-extend) AMI(OpenFOAM)

Section of the Domain

overLapGgi(FOAM-extend)

Thanks for Your Attention

2015-11-13 Gothenburg Region OpenFOAM Meeting 21