Session: 04-07 High Hydrogen III

Paper Number: 121349

121349 - Turbulent Burning Velocity of High Hydrogen Flames 

Hydrogen is a promising gas turbine fuel to meet net zero carbon goals.  Utilization of hydrogen as a fuel requires understanding its fundamental combustion characteristics. This would in turn help in making informed design decisions for hydrogen powered combustion systems. Any real combustion system operates in a turbulent environment which leads to a coupling between turbulence and chemical processes.  Turbulent flame speed (S_T,GC) is a useful parameter to characterize flame propagation properties in these complex systems. In this study, turbulent flame speed measurements for H₂/CH₄ blends (with H₂ concentration up to 92% by volume of fuel) have been made at gas turbine relevant conditions. These measurements were made with OH chemilumiscence in a high-pressure Bunsen burner facility with variable turbulence generator. Experiments were performed to study the effect of H₂ concentration, equivalence ratio, operating pressure, inlet gas temperature and turbulence intensity on S_T,GC at nominal flame conditions. Reference flame speed parameter have been investigated for normalizing S_T,GC that capture the varying fuel composition effect. Finally, two-parameter models have been explored to capture the effects of operating pressure and inlet gas temperature on S_T,GC.

Keywords:  turbulent flame speed, H₂/CH₄ blends, gas turbine relevant conditions.

Presenting Author: Hari Priya Rajagopalan Georgia Institute of Technology

Presenting Author Biography: Hari Priya is a fourth year PhD student in the department of Aerospace Engineering at Georgia Tech.

Authors:

Hari Priya Rajagopalan Georgia Institute of Technology
Renee Cole Georgia Institute of Technology
David Wu Georgia Institute of Technology
Benjamin Emerson Georgia Institute of Technology
Timothy Lieuwen Georgia Institute of Technology