Evaluation of H-adsorption Effect on Wall Chemical Quenching Using Two-photon Absorption Laser Induced Fluorescence

Hydrogen atom concentration in CH4/air premixed flame in a narrow channel is measured using a newly-developed two-photon absorption LIF (H-TALIF) setup with improved THG efficiency at 205nm. Laser fluence smaller than 0.09 J/cm2 is used for H-TALIF measurement free of the interference from photodissociation. Numerical simulations considering only the adsorption of hydrogen atom on the wall are also conducted. The initial sticking coefficient of...