Acoustic fields effect study on the lifetime of overheated n–pentane


Аuthors

Lipnyagov E. V., Perminov S. A., Parshakova M. A.*

Institute of Thermal Physics of the Ural Branch of the Russian Academy of Sciences , Amundsena St., 107a Ekaterinburg, 620016, Russia

*e-mail: parmari@yandex.ru

Abstract

The effect of ultrasound on the lifetime of overheated n-pentane in a glass capillary at atmospheric pressure and temperatures from 100 to 130°С (overheating from 63.9 to 93.9°С) was studied. The study was performed by the method of the lifetimes of overheated liquid measuring, according to which the overheating is attained by pressure dump on the thermostatically controlled liquid. The boiling-up process was recorded by the high-speed shooting. The glass capillary has an internal diameter of 2.45 mm and a cone-shaped expansion 30 mm high. The FM-12T ceramic plate of 12 mm diameter is glued to the cone-shaped capillary butt end. The plate oscillations were excited by the GZ-33 generator, allowing change the sound waves frequency from 9 to 106 kHz. The additional impact of the ultrasonic field on the liquid under study was provided by immersing the capillary lower conical part to various depths of the ultrasonic bath (1, 5, 15, 30 mm).

The conducted tests demonstrated that the lifetime of the overheated liquid decreased as ultrasonic oscillations frequency approached the resonance frequency of the cell, and under certain conditions, it can be brought to zero. Immersion of the conical part of the capillary, containing liquid, into the sonic bath with a simultaneous action of the piezo-radiator appeared to be most effective. The authors suppose that the acoustic field low frequency from the ultrasound bath (44 kHz) increases the average radius of gas-vapor bubbles, while high frequencies from the piezo-radiator, close to resonant frequencies (≈106 kHz) increase their stationary concentration. It follows from video shooting data that on the impact of the ultrasound of high frequency only (106 kHz), a great number of secondary bubbles is being formed on the interphase surface of the growing bubble. An additional immersion of the capillary into the ultrasonic bath with depth increase leads to a sharp decrease in the bubble growth rate and «protuberances» occurrence on the liquid-vapor interphase surface.

Keywords:

nucleation, overheat, boiling-up, ultrasound, n‑pentane, high-speed video

References

  1. Margulis M.A. Osnovy zvukokhimii. Khimicheskie reaktsii v akusticheskikh polyakh [Fundamentals of sound chemistry. Chemical reactions in acoustic fields]. Moscow: High School Press, 1984. 272 p. In Russ.

  2. Akulichev V.A. Kavitatsiya v kriogennykh i kipyashhikh zhidkostyakh [Cavitation in cryogenic and boiling liquids]. Moscow: Nauka, 1978. 278 p. In Russ.

  3. Baidakov V.G. Explosive Boiling of Superheated Cryogenic Liquids. Wiley–VCH Verlag GmbH &. Co. KGaA, Weinheim, 2007. 352 p.

  4. Ermakov G.V. Termodinamicheskie svojstva i kinetic vskipaniya peregretykh zhidkostej [Thermodynamic properties and boiling-up kinetics of superheated liquid]. UB RAS, Yekaterinburg, 2002. 270 p. In Russ.

  5. Apfel R.E. Acoustically induced explosions of superheated droplets. J. Acoust. Soc. Am., 1975, vol. 57, no. 6, Part 1, pp. 1371–1373. DOI:10.1121/1.380622

  6. Hijikata K., Mori Y., Nagatani T. Experimental study on bubble nucleation in the oscillating pressure field. J. Heat Transfer, 1978, vol. 100, no. 3, pp. 460–465. doi:10.1115/1.3450831

  7. Baidakov V.G, Kaverin A.M., Skripov V.P. Аkusticheskay akavitatsiya i skorost’ ul’trazvuka v peregretom zhidkom ksenone [Acoustic cavitation and ultrasonic velocity in superheated liquid xenon]. Theses of the report of the 9th All-Union Acoustic Conference. Section B. Moscow, 1977. pp. 87–90. In Russ.

  8. Baidakov V.G., Kaverin A.M., Skripov V.P. Аkusticheskaya kavitatsiya v peregretoj zhidkosti [Acoustic cavitation in a superheated liquid]. Аkusticheskij zhurnal – Acoustic magazine, 1981, vol. 27, no. 5, pp. 697–703. In Russ.

  9. Ermakov G.V., Fedorov A.P. Sposob kontrolya ustojchivosti peregretoj zhidkosti. A.s. № 945776 (SSSR) [Method for controlling the stability of superheated liquid. Author’s certificate № 945776 (USSR)]. Byulleten’ izobretenij – Bulletin of inventions, 1982, no. 27. In Russ.

  10. Skripov V.P., Sinitsyn E.N. Kinetika vskipaniya peregretogo n-pentana [The kinetics of boiling-up of superheated n-pentane]. Zhurnal fizicheskoj khimii – Journal of Physical Chemistry, 1968, vol. 42, p. 844. In Russ.

  11. Skripov V.P., Sinitsyn E.N., Pavlov P.A., Ermakov G.V., Muratov G.N, Bulanov N.V., Baidakov V.G. Thermophysical Properties of Liquids in the Metastable (Superheated) State. Gordon and Breach Science Publishers, London, 1988.

  12. Lipnyagov E.V., Parshakova M.A., Perminov S.A., Ermakov G.V. The visualization of boiling-up onset of superheated n-pentane in a glass capillary at atmospheric pressure by high-speed video. Int. J. Heat and Mass Trans., 2013, vol. 60, no. 1, pp. 612–615. DOI:10.1016/j.ijheatmasstransfer.2013.01.022

  13. Lipnyagov E.V., Perminov S.A., Parshakova M.A., ZakharovM.S. Vizualizatsiya vskipaniya sil’no peregretogo n-pentana v steklyannom kapillyare pri davleniyakh vyshe atmosfernogo [Visualization of boiling-up onset of highly superheated n-pentane in a glass capillary at positive pressures]. Teplovye protsessy v tekhnike – Thermal processes in engineering, 2015, vol. 7, no. 5, pp. 199–203. In Russ.

  14. Lipnyagov E.V., Parshakova M.A., Perminov S.A. The study of boiling-up onset of highly superheated n-pentane in a glass capillary at different pressures with the use of high-speed video. I. Visualization and nucleation sites. Int. J. Heat and Mass Trans., 2017, vol. 104, no. 1, pp. 1353–1361. DOI:10.1016/j.ijheatmasstransfer.2016.06.020

  15. Perminov S.A., Ermakov G.V. Boiling-up of superheated water and water solutions under ultrasound influence. Thermophysics and Aeromechanics, 2010, vol. 17, no. 1, pp. 107–112. DOI:10.1134/S0869864310010129

  16. Agranat B.A. Osnovy fiziki i tekhniki ul’trazvuka [Fundamentals of physics and engineering of ultrasound]. Moscow: High school Press, 1987. 352 p. In Russ.

  17. Hsieh D.Y.,Plesset M.S. Theory of rectified diffusion of mass into gas bubbles. J. Acoust. Soc. America, 1961, vol. 33, no. 2, pp. 206–215. DOI:10.1121/1.1908621

  18. Khavsky N.N. Tekhnologicheskij ehffekt odnovremennogo vozdejstviya ul’trazvukovykh kolebanij razlichnykh chastot v zhidkostyakh [Technological effect of simultaneous action of ultrasonic oscillations of various frequencies in liquids]. Аkusticheskij zhurnal – Acoustic magazine, 1979, vol. 25, no. 1, pp. 119–123. In Russ.

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