FORCED PISTON EFFECT EXPERIMENTS UNDER 1g AND μg AT VARIOUS DENSITIES AROUND THE CRITICAL POINT OF SF<sub>6</sub>

Bartscher, Christoph; Straub, Johannes

Microgravity Fluid Physics & Heat Transfer

ISBN 印刷: 978-1-56700-147-1

ISBN オンライン: 978-1-56700-444-1

FORCED PISTON EFFECT EXPERIMENTS UNDER 1g AND μg AT VARIOUS DENSITIES AROUND THE CRITICAL POINT OF SF₆

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Christoph Bartscher Technische Universitat Munchen

Johannes Straub Institute A for Thermodynamics, Technical University München Arcisstr. 21, 8000 München 2, FRG

要約

To further investigate the piston effect under 1g and microgravity we have developed a new test cell with a variable volume for a density range of ±35% around the critical density of SF₆ (T_c = 318.717 K, P_c = 3.7545 MPa, ρ_c = 742 kg/m³, Wyczalkowska and Sengers) to enable a systematic determination of the isentropic dynamic temperature propagation. This cell is inserted in a precise thermostat used in the French ALICE II facility. Results of various forced piston effect experiments at different densities and temperatures are presented. A temperature undershoot is observed and an explanation given.

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FORCED PISTON EFFECT EXPERIMENTS UNDER 1g AND μg AT VARIOUS DENSITIES AROUND THE CRITICAL POINT OF SF6

要約

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FORCED PISTON EFFECT EXPERIMENTS UNDER 1g AND μg AT VARIOUS DENSITIES AROUND THE CRITICAL POINT OF SF₆