Session: 04-29 Emissions Hydrogen/Ammonia II

Paper Number: 152877

Co-Firing Hydrogen With Natural Gas for 9 MW Siemens Energy Dry Low Emissions Combustor: Part II – Large Eddy Simulations 

To demonstrate Siemens Energy's Industrial gas turbine engines for 30% hydrogen capability, the 9 MW rating of Dry Low Emissions (DLE) combustion system of the SGT-300-2S engine was tested at the Siemens Energy Clean Energy Centre in Berlin. The fuel blend tested contained up to 40% hydrogen by volume. The test results were reported in Part I of the paper. This paper Part II presents the numerical simulation results.

Reacting flow simulations for fuels containing hydrogen present a challenge with existing combustion models and chemical mechanisms. This paper aims to numerically validate the effect of hydrogen on combustion performance. The Simcenter STAR-CCM+® solver was used to conduct numerical simulations of the DLE combustor in the High-Pressure rig configuration. Large Eddy Simulations with a Flamelet Generated Manifold (FGM) combustion model and kinetic rate closure were employed. The GRI-MECH 3.0 and O'Conaire chemical mechanism was used to generate Flamelet manifolds for each configuration of varied hydrogen concentration.

Simulations with natural gas was performed first to provide baseline validation, followed with simulations of natural gas blended with 30%, 35% and 40% hydrogen by volume were carried out. Effect of pilot fuel scheduled was also investigated numerically to provide physical insight on the flame aerodynamics. Flame structure, NO_x emission, combustor exit profiles and combustion dynamics signatures were investigated at ISO full load engine condition for these fuel compositions and compared with natural gas. Results from numerical studies were validated against the High-Pressure rig test.

Presenting Author: Liam Mcmanus Siemens Digital Industries Software

Presenting Author Biography: Liam graduated from the University of Glasgow in 2015 with a MEng in Aeronautical Engineering. He went on to work for Rolls-Royce for two years before joining Siemens Digital Industries Software.
Here he worked as an Application Engineer supporting customers in combustion and turbomachinery applications using the Simcenter STAR-CCM+ CFD tool. In August 2021 he joined the Physics team for Technical Product Management. Responsible for helping further develop Reacting Flows functionality.

Authors:

Liam Mcmanus Siemens Digital Industries Software
Nick Fogell Siemens Digital Industries Software
Kexin Liu Siemens Energy Industrial Turbomachinery Ltd
Suresh Sadasivuni Siemens Energy Industrial Turbomachinery Ltd
Jadeed Beita jadeed.beita@siemens-energy.com
Erik Munktell Siemens Digital Industries Software