Design Exploration with CFD for Better Dry Low NOx Hydrogen Gas Turbine Combustors
Tuesday, June 28, 2016

Safely combusting hydrogen (H2) in gas turbines, while still providing sufficient energy density, could help meet ever-increasing energy demands by making use of an economically attractive fuel supply. For instance, some of the electricity intermittently produced by some renewable energy sources such as wind and solar could be used to produce hydrogen, which is then used to power gas turbines (GT) to help meet peak energy demands, especially at times when the wind isn’t blowing and the sun isn’t shining.

By viewing this webcast, you will hear from guest presenter Anis Haj Ayed from B&B-AGEMA in Aachen, Germany, who is a subject-matter expert in the use of CFD for leading-edge GT combustion simulations. Anis shares the success story associated with his company’s ability to discover better designs, faster, ensuring the desired performance of innovative Dry Low NOx (DLN) micro-mix hydrogen combustors in modified gas turbines.

Traditional gas turbine combustors use large high energy density flames, whereas micro-mix combustors use many smaller flamelets or micro-flames in order to provide the desired energy density. Specifically, Anis will describe how the combined use of STAR-CCM+® and HEEDS/Optimate+ enabled B&B-AGEMA to:

  • Design an innovative micro-mix hydrogen gas turbine combustor, having both high energy density and low NOx, without the need for water or steam injection.
  • Discover several better designs as compared to the original baseline design, not just one, by exploring the effects of varying the size, shape, and number of air gates and fuel injectors.
  • Limit manufacturing costs (by reducing the number of injectors needed) and reduce dependence on slow and expensive physical testing of new GT combustors.
  • Ensure the desired air/fuel mixing, flame shape, and fluid and solid temperatures in the H2 combustor (reducing residence time of O2 and N2 in hot regions). 
  • Accurately predict NOx production by including finite-rate complex chemistry and dedicated NOx models directly in the high-fidelity CFD simulations.
Jim Ryan
Anis Haj Ayed
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