Measurement of the acoustic nonlinearity parameter in liquid alkanes under pressure and comparison with the Lee - Kesler correlation

Frédéric Plantier (1) , Jean-Luc Daridon (1) , Bernard Lagourette (1)

1 TEFC - Thermodynamique et Energétique des fluides complexes

Measurements of the nonlinear acoustic parameter B/A as a function of pressure and temperature have been conducted for three linear alkanes (n-pentane, n-hexane, and n-heptane) in the pressure range 0.1 to 50 MPa and temperature range 303.15 to 373.15 K. The experimental technique used is based on a phase-comparison method involving measurement of the change of the speed of sound with pressure in an isentropic process. Predictions of the nonlinear acoustic parameter based on the Lee - Kesler correlation are also presented and compared with the experimental values.

Mots clés: Isothermal curves; Phase comparison methods Engineering controlled terms: Acoustics; Alcohols; Amplitude modulation; Atmospheric pressure; Correlation methods; Hydrocarbons; Molecular weight; Numerical methods; Phase shift; Piezoelectric devices; Sampling; Signal generators; Specific heat; Thermodynamics; Transducers; Ultrasonics Engineering main heading: Paraffins

Domaines: Chimie-Physique [physics.chem-ph]

Frédéric Plantier, Jean-Luc Daridon, Bernard Lagourette. Measurement of the acoustic nonlinearity parameter in liquid alkanes under pressure and comparison with the Lee - Kesler correlation. High Temperatures-High Pressures, 2003, 35-36 (1), pp.109-116. ⟨hal-00706823⟩