Thermodynamic Method for Measuring the B/A Nonlinear Parameter Under High Pressure

• Autorzy: Kiełczyński, P. , Szalewski, M. , Balcerzak, A. , Wieja, K. , Rostocki, A. , Siegoczyński, R.
• Języki publikacji: EN

Abstrakty

EN

The nonlinearity parameter B/A is a measure of the nonlinearity of the equation of state for a fluid. The nonlinearity parameter B/A is a physical parameter often used in acoustics, from underwater acoustics to biology and medicine. It can provide information about structural properties of the medium, internal pressure and inter-molecular spacing. The thermodynamic method has been applied for determination of B/A parameter in diacylglycerol (DAG) oil as a function of pressure at various temperatures. Isotherms of the density and phase velocity of longitudinal ultrasonic wave as a function of pressure have been measured. Using the thermodynamic method along with measured isotherms of sound speed and density, the nonlinearity parameter B/A (for DAG oil) was evaluated as a function of pressure (up to 220 MPa) at various temperatures ranging from 20 to 50◦C.

Słowa kluczowe

PL

metoda termodynamiczna; wysokie ciśnienie; prędkość fali ultradźwiękowej

EN

nonlinearity parameter B/A; thermodynamic method; high pressure; longitudinal ultrasonic wave velocity

• Czasopismo: Engineering Transactions
• Rocznik: 2014
• Tom: Vol. 62, iss. 1
• Strony: 5--15
• Opis fizyczny: Bibliogr. 19 poz., rys., wykr.

Twórcy

autor

Kiełczyński, P.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B, 02-106, Warszawa, Poland,

autor

Szalewski, M.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B, 02-106, Warszawa, Poland

autor

Balcerzak, A.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B, 02-106, Warszawa, Poland

autor

Wieja, K.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B, 02-106, Warszawa, Poland

autor

Rostocki, A.

• Warsaw University of Technology Faculty of Physics Koszykowa 75, 00-662 Warszawa, Poland

autor

Siegoczyński, R.

• Warsaw University of Technology Faculty of Physics Koszykowa 75, 00-662 Warszawa, Poland

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