Abstract
Summary In a laboratory study, an automated, linear-traversing, sampling probe enabled real-time gas analysis and temperature measurements within the combustion zone. Results showed that the combustion-zone thickness was on the order of 1 in. [25 mm] for a nominal injected air flux of 20 scf/hr-ft2 [1.7 × 10-3 std m3/s·m2]. The combustion-zone thickness was found to be kinetically controlled. The combustion reaction could not be represented by the commonly used first-order, Arrhenius kinetics; however, the actual kinetics of combustion is unimportant for performance prediction because the combustion-front velocity is oxygen-flow-rate-controlled.
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