Abstract

Estimation of the local dissociation degree and the local mass-specific enthalpy of a pure oxygen plasma flow determined mainly from laser-induced fluorescence measurements are reported. Mea surements have been conducted for several generator parameters in an inductively heated plasma wind tunnel. Additional probe measurements of total pressure together with the deduced transla tional temperature are used to estimate the local mass-specific enthalpy. For a reference condition, full dissociation has been measured. The measured translational temperature of atomic oxygen for this condition is $T=3500\mathrm{K}$. Subsequently, the local mass-specific enthalpy has been derived using these local density and temperature measurements. For the reference condition the estimated value of $h=27\mathrm{MJ}/\mathrm{kg}$ is in good agreement with the probe measurements and results from diode laser absorption spectroscopy.

© 2008 Optical Society of America

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