Determination of Thermal Properties From Steady-State Heat Transfer Measurements on a Heated Tungsten Wire in Vacuum and Helium Gas

An experimental facility in its developed form is described for the determination of a number of thermal properties as a function of temperature in the range 400–2500 K. These are the resistivity, tensile breaking stress, the total hemispherical emittance of the tungsten wire, and the thermal conductivity of helium. These properties are computed from the knowledge of steady-state heat transfer data from tungsten wire in vacuum and in the presence of helium at pressures covering the temperature-jump and continuum regimes. These measured properties are discussed in the light of literature values wherever available.