Scaling of an Aviation Hydrogen Micromix Injector Design for Industrial GT Combustion Applications

Abstract Decarbonising the energy grid through renewable requires a firming technology to harmonize supply and demand. Hydrogen-fired gas turbine power plants offer closed loop by burning green hydrogen produced with excess from energy. Conventional dry low NOx (DLN) combustors have been optimized for strict emission limits. A higher flame temperature of drives emissions faster speed alters combustion behavior significantly. Micromix offers potential conditions combustion. Many small channels, so-called airgates, accelerate airflow followed jet-in-crossflow injection hydrogen. This leads short-diffusion flames following principle maximized mixing intensity minimized scales. paper shows challenges an economical micromix application aero-derivative industrial high-pressure ratio. transfer based on research in ENABLEH2 project is carried out. The driving parameter ground use adaption increased fuel orifice diameter 0.3 mm 1.0 reduce cost complexity. Increasing mass flow larger emissions. impact was studied RANS simulation trends key design parameters were shown. Increased velocity airgates pressure drop reduced mixing. Altering penetration depth reduction without compromising loss. Two improved designs are found, their performance discussed.