Speed of sound in helium-xenon mixtures in wide ranges of state parameters
S.V. Stankus, S.G. Komarov, O.S. Dutova, A.B. Meshalkin
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: speed of sound, ultrasonic interferometer method, high pressures and temperatures, inert gases, helium-xenon mixtures
Abstract
Using an ultrasonic interferometer in the temperature range from 293 to 393 K at pressures from 0.13 to 1.5-2.8 MPa, the speed of sound U was measured in helium-xenon gas mixtures with a helium content of 60.34, 71.72, and 85.32 at. %. The measurement errors of temperature, pressure and speed of sound were ±20 mK, ±4 kPa and ± (0.15-0.30) %, respectively. By approximating the experimental data for each composition, equations were obtained to describe changes in the speed of sound as a function of pressure and temperature over the entire measurement range. The existing reference and experimental data on the speed of sound in inert gases and He-Xe mixtures were analyzed. A method for calculating U of mixtures with a helium content above 71.7 at. % He to a temperature of 1500 K and a pressure of up to 7 MPa was developed.
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