Propagation of powerful acoustic pulse with shock front in relaxing liquids

• Autorzy: Andreev V. , Khokhlova V. , Pischalnikov Y. , Sapozhnikov O.
• Konferencja: International Symposium on HYDROACOUSTICS AND ULTRASONICS EAA Symposium (formerly 13th FASE Symposium) Gdańsk-Jurata, 12-16 May 1997
• Języki publikacji: EN

Abstrakty

EN

Shock wave propagation in relaxing fluid is studied theoretically and experimentally. Modified spectral method is used in numerical simulations to provide an accurate description of weak shocks. For the medium with only one relaxation time, the waveforms of initially triangular pulse with shock front are calculated at various distances. It is shown that nonlinearity results in additional increasing of pulse duration and additional suppression of shock front damping. Experiments are performed in acetic acid as a monorelaxing medium. Short pulses are excited by optoacoustic source. A relaxation time of the fluid is changed by temperature variation. It is shown that pulse distortion is sensitive to the temperature of the medium. A relaxation time is evaluated from the analysis of shock pulse waveform after passing a layer of acetic acid. Theoretical and experimental results are in a good agreement.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1997
• Tom: Vol. 1
• Strony: 287--292
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Andreev V.

• Department ot Acoustics, Physics Faculty, Moscow State University, Moscow 119899, RUSSIA

autor

Khokhlova V.

• Department ot Acoustics, Physics Faculty, Moscow State University, Moscow 119899, RUSSIA

autor

Pischalnikov Y.

• Department ot Acoustics, Physics Faculty, Moscow State University, Moscow 119899, RUSSIA

autor

Sapozhnikov O.

• Department ot Acoustics, Physics Faculty, Moscow State University, Moscow 119899, RUSSIA

Bibliografia

• 1. V.G.Andreev, O.A.Sapozhnikov, S.T.Timofeev. Evolution of acoustic pulses in a relaxational medium. Acoustical Phys., v.40, No. 2, 1994, 172-175.
• 2. O.V.Rudenko, O.V.Soluyan. Theoretical foundations of nonlinear acoustics. N - Y: Plenum, 1977
• 3. Yu.A.Pischal'nikov, O.A.Sapozhnikov, V.A.Khokhlova. A modification of the spectral description of nonlinear acoustic waves with discontinuities., Acoustical Phys.,v.42, No.3, 1996,362-367.
• 4. V.A.Krasilnikov, D.V.Khaminov. A propagation of ultrasound waves of a finite amplitude in a relaxational liquid. Akusticheskii Zhurnal, v.5, No.2, 1959, 166.
• 5. Bergman,L., Der Ultraschall und seine Anwendung in Wissenschaft und Technik. Zurich, 1954.
• 6. L.A. Davidovich, A.A. lvanov, S.Makhkamov, etc. Akusticheskii Zhurnal, v.19, No.1, 1973, 26.