Optical measurement of the speed of sound in air over the temperature range 300–650 K

2000 ◽  
Vol 108 (4) ◽  
pp. 1946-1948 ◽  
Author(s):  
Roger C. Hart ◽  
R. Jeffrey Balla ◽  
G. C. Herring
Keyword(s):  
Speed Of Sound ◽  
Optical Measurement ◽  
Temperature Range

Static permittivity, density, speed of sound, and refractive index of 2-propoxyethanol mixtures with water in a wide temperature range

2016 ◽  
Vol 102 ◽  
pp. 164-177 ◽  
Author(s):  
Dorota Chęcińska-Majak ◽  
Krzysztof Klimaszewski ◽  
Marta Stańczyk ◽  
Adam Bald ◽  
Ram Jeewan Sengwa ◽  
...  
Keyword(s):  
Refractive Index ◽  
Speed Of Sound ◽  
Wide Temperature Range ◽  
Static Permittivity ◽  
Temperature Range

scholarly journals Speed-of-sound measurements in (argon + carbon dioxide) over the temperature range from (275 to 500) K at pressures up to 8 MPa

2016 ◽  
Vol 99 ◽  
pp. 54-64 ◽  
Author(s):  
Robin Wegge ◽  
Mark O. McLinden ◽  
Richard A. Perkins ◽  
Markus Richter ◽  
Roland Span
Keyword(s):  
Carbon Dioxide ◽  
Speed Of Sound ◽  
Temperature Range

scholarly journals Thermophysical Properties of 1-Butanol at High Pressures

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5046
Author(s):  
Marzena Dzida
Keyword(s):  
Speed Of Sound ◽  
Thermophysical Properties ◽  
High Pressures ◽  
Fuel Additive ◽  
Temperature Range ◽  
Isobaric Thermal Expansion ◽  
Isentropic And Isothermal Compressibilities ◽  
Overlap Method ◽  
Pulse Echo ◽  
Better Than

1-Butanol can be considered as a good fuel additive, which can be used at high pressures. Therefore, the knowledge of high-pressure thermophysical properties is crucial for this application. In this paper, new experimental data on the speed of sound in 1-butanol in the temperature range from 293 to 318 K and at pressures up to 101 MPa are reported. The speed of sound at a frequency of 2 MHz was measured at atmospheric and high pressures using two measuring sets operating on the principle of the pulse–echo–overlap method. The measurement uncertainties were estimated to be better than ±0.5 m·s−1 and ± 1 m·s−1 at atmospheric and high pressures, respectively. Additionally, the density was measured under atmospheric pressure in the temperature range from 293 to 318 K using a vibrating tube densimeter Anton Paar DMA 5000. Using the experimental results, the density and isobaric and isochoric heat capacities, isentropic and isothermal compressibilities, isobaric thermal expansion, and internal pressure were calculated at temperatures from 293 to 318 K and at pressures up to 100 MPa.

Deviation of the Calculated of Density of Refrigerant Fluids in Both Super and Sub Critical Regions

2011 ◽  
Author(s):  
Neda Mobinipouya
Keyword(s):  
Thermodynamic Properties ◽  
Speed Of Sound ◽  
Equations Of State ◽  
Numerical Procedure ◽  
Corresponding States ◽  
Temperature Range ◽  
Critical Regions ◽  
Two Parameter ◽  
Good Agreement

A numerical procedure has successfully predicted accurate values of thermodynamic properties in seven cubic equations of state (EOS) in predicting thermodynamic properties of nine ozone-safe refrigerants both in super and sub-critical regions. Refrigerants include R22, R32, R123, R124, R125, R134a, R141b, R143, and R152a and equations of state, considered here, are Ihm-Song-Mason (ISM), Peng-Robinson (PR) [2], Redlich-Kwong (RK), Soave-Redlikh-Kwong (SRK), Modified Redlickh-Kwong (MRK), Nasrifar-Moshfeghian (NM), and TCC were shown in this paper. In general, the results are in favor of the preference of TCC and PR EOS over other remaining EOS’s in predicting gas densities of all aforementioned refrigerants in both super and sub critical regions. Typically, PR and SRK are in good agreement with those obtained from recent correlations and speed of sound measurements. Therefore, these two EOS stand over other EOS both in sub and super critical regions. All EOS follow two-parameter principle of corresponding states at T/Tc higher than 8 and lower than 1 except NM EOS. In the temperature range 1<T/Tc<8, PR and SRK still follow above mentioned principle. The same trend has been observed for other refrigerants.

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