Abstract

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 the H atom is estimated as 0.1 for SUS321 and 0.01 for quartz by fitting simulated H atom distribution to the H-TALIF measurement result.

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