水素-空気超音速混合層における触媒反応を利用した水素濃度の評価

概要

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The authors propose a new simple method which can be used to evaluate hydrogen concentration in hydrogen-air supersonic mixing layers without the need for costly apparatus. The catalytic reaction occurs on an electrically heated platinum wire in hydrogen-air supersoic mixing layers. By adapting the technique of constant temperature type hotwire anemometers, a catalytic heat release rate is measured. A series of experiments with different Pt wire temperatures shows that Pt wire temperature has little effect on the catalytic heat release rate, implying that the rate of transfer of molecules to the Pt wire surface is the controlling factor. Accordingly, the heat release rate is related to the hydrogen concentration in the flow. The profile of hydrogen concentration is obtained by assuming the equivalent spatial distribution of heat and mass transfer. Stoichiometric conditions are found to be realized in the mixing layer.
一般社団法人日本機械学会の論文
1999-08-25