Experimentelle Bestimmung der Wärmeleitfähigkeit von Luft und Luft/ Wasserdampfgemischen im Temperaturbereich 2000 K≤ T≤7000 K

摘要

An experimental technique which allows heat conductivity to be determined in hot gas mixtures is described for use in heat transfer calculations in the hypersonic range. A laser differential interferometer was used to determine the density distribution in the thermal boundary layer generated after the reflection of a strong shock wave at the flat end wall of a shock tube. From this, the heat conductivity of the gas heated up under the action of the shock was derived. Heat conductivity of air and mixtures of air and water vapor was determined in the temperature range between 2,000 and 7,000 K. (Author)