Catalytic Recombination Characteristics of Atomic Oxygen on Material Surface by Optical Emission Spectroscopy
Catalytic recombination of atomic oxygen, the main species of air ionization, on heat shield material surfaces was studied in a microwave plasma flow reactor. The atomic oxygen concentration profile above material samples was nonintrusive measured by optical emission spectroscopy. The catalytic recombination coefficients on material surfaces were deduced by the diffusion equation. The catalytic recombination coefficients for the heat shield materials at high temperature obtained in the present experiment are very important parameters for thermal shield design of space vehicles.
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