Journal ArticleDOI
Apparatus for the measurement of the speed of sound of ammonia up to high temperatures and pressures.
Reads0
Chats0
TLDR
An apparatus for the measurement of the speed of sound based on the pulse-echo technique is presented andspeed of sound data are presented with an uncertainty between 0.02% and 0.1%.Abstract:
An apparatus for the measurement of the speed of sound based on the pulse-echo technique is presented. It operates up to a temperature of 480 K and a pressure of 125 MPa. After referencing and validating the apparatus with water, it is applied to liquid ammonia between 230 and 410 K up to a pressure of 124 MPa. Speed of sound data are presented with an uncertainty between 0.02% and 0.1%.read more
Citations
More filters
Journal ArticleDOI
Fundamental equation of state correlation for hexamethyldisiloxane based on experimental and molecular simulation data
Monika Thol,Frithjof H. Dubberke,Gábor Rutkai,Thorsten Windmann,Andreas Köster,Roland Span,Jadran Vrabec +6 more
TL;DR: In this paper, an empirical fundamental equation of state correlation in terms of the Helmholtz energy is presented for hexamethyldisiloxane, which is based on the pulse-echo technique and operates up to 150MPa in the temperature range between 250-K and 600-K.
Journal ArticleDOI
Speed of Sound Measurements and Fundamental Equations of State for Octamethyltrisiloxane and Decamethyltetrasiloxane
TL;DR: In this paper, an equation of state in terms of the Helmholtz energy for octamethyltrisiloxane and decamethyltetra-siloxane is presented.
Journal ArticleDOI
Thermodynamic Properties of Octamethylcyclotetrasiloxane
Monika Thol,Gábor Rutkai,Andreas Köster,Frithjof H. Dubberke,Thorsten Windmann,Roland Span,Jadran Vrabec +6 more
TL;DR: In this paper, an equation of state for octamethylcyclotetrasiloxane is presented, which is valid from the triple point temperature to T = 590 K for pressures up to p = 180 MPa.
Journal ArticleDOI
Burst design and signal processing for the speed of sound measurement of fluids with the pulse-echo technique
TL;DR: Applying a Fourier transformation based digital filter on acoustic wave signals increases their signal-to-noise ratio and enhances their time and amplitude resolutions, improving the overall measurement accuracy.
Journal ArticleDOI
Thermodynamic Properties of Dodecamethylpentasiloxane, Tetradecamethylhexasiloxane, and Decamethylcyclopentasiloxane
TL;DR: In this paper, the authors developed new fundamental equations of state for higher-order siloxanes based on the Helmholtz energy, which allow for the calculation of any thermodynamic state property by means of derivatives with respect to the natural variables, namely temperature and density.
References
More filters
Journal ArticleDOI
The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use
Wolfgang Wagner,Andreas Pruß +1 more
TL;DR: The International Association for the Properties of Water and Steam (IAPWS) adopted a new formulation called "The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use" as discussed by the authors.
Journal ArticleDOI
Review of transient field theory for a baffled planar piston
TL;DR: The theoretical approaches used to study the velocity potential and pressure fields radiated by a planar piston source vibrating in an infinite rigid baffle are broadly reviewed and discussed with emphasis on the basic mathematical methods employed as discussed by the authors.
Journal ArticleDOI
The speed of sound and derived thermodynamic properties of pure water at temperatures between (253 and 473) K and at pressures up to 400 MPa
C.-W. Lin,J. P. M. Trusler +1 more
TL;DR: The results imply that the uncertainties of properties computed from IAPWS-95 may be significantly reduced over the major part of the region investigated in this work.
Journal ArticleDOI
The speed of sound and derived thermodynamic properties of methane at temperatures between 275 K and 375 K and pressures up to 10 MPa
J.P.M. Trusler,M. P. Zarari +1 more
TL;DR: In this paper, the speed of sound in methane has been measured with an estimated accuracy of better than 0.002 per cent in the temperature range 275 K to 375 K at pressures up to 10 MPa using a spherical resonator.
Journal ArticleDOI
Precision acoustic measurements with a spherical resonator: Ar and C2H4
TL;DR: In this paper, the authors used a spherical acoustic resonator to measure the speed and attenuation of sound in C2H4 in the temperature range 0 −100 ˚ c and the pressure range 0.15 −1.0 MPa.
Related Papers (5)
The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use
Wolfgang Wagner,Andreas Pruß +1 more
The speed of sound and derived thermodynamic properties of pure water at temperatures between (253 and 473) K and at pressures up to 400 MPa
C.-W. Lin,J. P. M. Trusler +1 more