Enhancing Insight Into Turbulent Lifted Hydrogen Jet Flames Using a Reynolds Stress, Stretched Flamelet Model

This study provides a numerical study of turbulent lifted hydrogen jet flames by employing a Reynolds stress, stretched flamelet model. Computations were conducted on turbulent lifted hydrogen jet flames using several pipe diameters with a range of jet exit velocities and different pipe exit shapes. The computed isotherms and the volumetric heat release rate contour lines are used to determine the thermal and reaction zone liftoff heights. By comparing computational results with experimental data, the limitations inherent in previous experiments concerning liftoff height are elucidated. The scrutinizing of the lifted flame base enhances the understanding of the dynamics governing hydrogen jet flames.