Determination of Gas-Flow Composition in Hot-Shot Wind Tunnels
V. D. Antsygin, S. M. Borzov, A. A. Maslov, O. I. Potaturkin, V. V. Shumskii, M. I. Yaroslavtsev
Keywords: flows, hot-shot wind tunnels, gas sampling, measurement of the composition of the mixture, small-size sensors
Pages: 69-77
Abstract
A method for gas sampling in hypersonic hot-shot wind tunnels is proposed. A sampler designed on the basis of this method is shown to ensure heat removal for "freezing" the sample and to provide reliable information about the composition of a hypersonic gas flow. A diagnostic system for multispecies gas mixtures on the basis of small-size sensors is developed and manufactured. Testing this system in an IT-302M hypersonic hot-shot wind tunnel shows that the measurements correctly capture the trends in the behavior of oxygen concentration as a function of flow energy, but the values are underestimated approximately by 2% with respect to the true values. Possible reasons for this behavior of the sensor are discussed.
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