Title :
Precision measurement of speed of sound in gases
Author :
Benedetto, G. ; Gavioso, R.M. ; Spagnolo, R.
Author_Institution :
Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy
Abstract :
Gas-filled resonators are considered the must accurate tool for precision measurement of speed of sound in gases. In particular spherical resonators facilitate detailed calculations of the energy losses which must be taken into account for the interpretation of experimental results. Speed of sound data obtained as a function of pressure along an isotherm allow determining perfect-gas properties, as the molar heat capacities, and the coefficient of a virial equation of state. The paper describes the experimental apparatus recently set-up at IEN and reports the first results of speed of sound in argon
Keywords :
acoustic resonators; acoustic wave velocity measurement; argon; equations of state; specific heat; Ar; argon; energy loss; equation of state; gas; molar heat capacity; sound speed measurement; spherical resonator; thermodynamic metrology; virial coefficient; Acoustic measurements; Density measurement; Equations; Frequency measurement; Gases; Resonance; Steel; Temperature distribution; Thermodynamics; Velocity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.776138
