benefits of enableh2 numerical and experimental hydrogen ... · siemens gas turbine portfolio...

This project has received funding from the EU Horizon 2020 research

and innovation programme under GA n° 769241

Benefits of ENABLEH2 Numerical and Experimental Hydrogen Micromix Combustion Research for the Stationary Gas Turbine Industry

9th EASN Conference on Innovation in Aviation and Space3rd – 6th September 2019, Athens, Greece

Prof. Pierre Q. Gauthier

Visiting Professor of Low Emission Combustion Modelling, Cranfield University

Senior Key Combustion Expert and Global Technical Focal Point for Combustion

CFD, Siemens GP

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GA no. 7692419th EASN Conference on Innovation in Aviation and Space

3rd – 6th September 2019, Athens, Greece2

Siemens gas turbine portfolio

20.04.2020

Energy Fossil Fuels

SGT5-8000H

400 MW

Energy Oil and Gas

SGT-100

5 MW

Ind. Trent 60 54/66 MW

Ind. RB211 27/32 MW

Industrial 501 5/6 MW

SGT-100 5 MW

SGT-200 7 MW

SGT-300 8 MW

SGT-400 13/14 MW

SGT-500 19 MW

SGT-600 24 MW

SGT-700 33 MW

SGT-750 37 MW

SGT-800 47/50 MW

SGT6-2000E 114 MW

SGT6-5000F 232 MW

SGT6-8000H 286 MW

SGT5-2000E 172 MW

SGT5-4000F 307 MW

SGT5-8000H 400 MW

Gas turbines produced over a wide range of ratings

Finspång

engines

http://www.energy.siemens.com/hq/en/power-generation/gas-turbines/

50Hz

60Hz

Aero-

derivative

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Chemistry (fuels)

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Fundamentals on hydrogen combustion

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Hydrogen ignites/burns fast

➢ H2 combustion moves closer to injector – potential

risk for “flash-back”

Hydrogen has a wide flammable region

➢ Much wider range of fuel/air-ratio to burn. H2-

combustion may appear in areas not normally

considered.

Hydrogen has a low ignition energy

➢ Only a fraction of the ignition energy is needed to

get H2 ”going” compared to methane

Result: Combustion is conceivable in unwanted sections/area and flame may appear inside burner (“flashback”)

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Flame Physics

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Flame Regimes: Borghi Diagrams

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Karlovitz

Number

Ka = tc /tn

Damkohler

Number

Da = tT /tc

U’ Turbulence Velocity Scale

SLLaminar Flame Speed Scale

lIntergral Length Scale

dfFlame Length Scale

I/df

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Hydrogen Flames…

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Numerical Investigation of Hydrogen Enriched Natural Gas in the SGT-800 Burner (GT2015-44040)

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Combustion test rig results:Visual flame behavior

20.04.2020

▪ Flame shape and position with different

amount of hydrogen addition, volume percent:

a) 100% CH4

b) 70% CH4 + 30% H2

c) 40% CH4 + 60% H2

d) 100% H2

▪ With increased amount of hydrogen

▪ Flame position is moving upstream

▪ Flame appears more compact

From GT2014-26293

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Computational model description

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• Flow solver Ansys CFX v14.5

• Three different fuel compositions

• CH4: 100%

• H2/CH4: 60/40%

• H2/CH4: 80/20%

• Turbulence model

• k – w SST

• SST-SAS

• Combustion model

• Flamelet along with Fractal mean reaction rate model.

Two different reaction rate constants, CR:

• CR = 2.6 (Only 100% CH4)

• CR = 1.0

Total mesh size of 32M cells with

maximum cell size of 1mm in mixing

and reaction regions

Red circle: pilot

fuel inlet

Air

Fuel

Air

Ratio ~1.7

Ratio ~2.6

Lam. flame speed vs Φ

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CFD results: (Methane/air combustion)

20.04.2020

Dynamic behavior of flame using SST-SAS, Cr = 1.0

Reaction Progress

Instantaneous Time averaged

Instant. Acetone / OH PLIF

GT2012-69936

SST SST SAS

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CFD results: ( Hydrogen enriched combustion)

20.04.2020

Predicted flame location compared to measurements

• Only SST-SAS with reaction rate CR=1.0 used for studying hydrogen addition.

• The flame stabilization point is moving upstream with hydrogen content

• Qualitatively same trend in CFD and OH PLIF measurements

• Flame center position moves upstream with hydrogen content

• Flame gets shorter with hydrogen content Averaged OH PLIF of methane-hydrogen-air flames

(GT2014-26293)0% H2 60% H2 80% H2 0% H2 30% H2 60% H2 80% H2

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CFD results: ( Hydrogen enriched combustion)

20.04.2020

Predicted flame location compared to measurements

• Averaged OH gradient may be a better indicator of flame position

• Qualitative comparison to reaction progress

• The flame stabilization point is moving upstream with hydrogen content

• Qualitatively same trend in CFD and OH PLIF measurements

0% H2 80% H2 PDF of OH PLIF Gradient

OH PLIF of methane-

hydrogen-air flames

(GT2014-26293)

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Thermoacoustic Analysis

20.04.2020

Flame front and fuel

injection particle tracks

This project has received funding from the EU Horizon 2020 research

and innovation programme under GA n° 769241

Thank [email protected]

20.04.2020

The ENABLEH2 project is receiving funding from the

European Union’s Horizon 2020 research and

innovation programme under grant agreement No

769241

benefits of enableh2 numerical and experimental hydrogen ... · siemens gas turbine portfolio...

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