Experimental Investigation of Heat Transfer Enhancement by Acoustic Streaming in a Closed Cylindrical Enclosure

Document Type : Research Article

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Abstract

In this study, the effect of acoustic streaming on heat transfer enhancement of a down-ward-facing horizontal heating surface in a closed cylindrical enclosure filled with water was investigated experimentally. Standing waves were generated between the heating source as a reflector and vibrating lower plate. Acoustic streaming is a steady circular flow induced by this standing waves field. The upper plate was heated with a constant heat flux and side-walls were kept at the constant temperature. Therefore, the gravitational effects were negligible and the heat transfer enhancement was due to ultrasonic vibrations. In order to find out the best range of ultrasonic power, the acoustic pressure was measured. The results show that the enhancement of the heat transfer can be up to 400% by the ultrasonic vibrations. The increase in the transducer power and the decrease in the height of the heater cause the higher heat transfer coefficient in the enclosure. In addition, the increase in cavitation phenomenon severely weakens the increase in heat transfer coefficient.

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References

[1] Loh, B., Hyun, S., Ro, P.I., Kleinstreuer, C., “Acoustic streaming induced by ultrasonic flexural vibrations and associated enhanced of convective heat transfer”, Journal of the Acoustical Society of America, 111, No. 2, pp. 875-883, 2002.
[2] Aktas, M.K., “Thermoacoustically Induced and Acoustically Driven Flows and Heat Transfer in Enclosures”, PhD thesis, Drexel University, May 2004.
[3] Nomura, S., Nakagawa, M., “Heat Transfer Enhancement by Ultrasonic Vibration”, Proceedings of the ASME/JSME Thermal Engineering Joint Conference 4, pp. 275-282, 1995.
[4] Nomura, S., Murakami, K., Aoyama, Y., Ochi, J., “Effects of Changes in Frequency of Ultrasonic Vibration on Heat Transfer”, Heat Transfer-Asian Researches, 29, No. 5, pp. 358-372, 2000.
[5] Ro, P.I., Loh, B., “Feasibility of using ultrasonic flexural waves as a cooling mechanism”, IEEE
Transactions on Industrial Electronics, 48, No. 1, pp.143-150, 2001.
[6] Wu, T., Ro, P.I., “Heat Transfer Performance of a Cooling System using Vibration Piezoelectric Beams”, Journal of Micromechanics and Microengineering, 15, pp. 213-220, 2005.
[7] Hyun, S, Lee, D., Loh, B., “Investigation of Convective Heat Transfer Augmentation using Acoustic Streaming Generated by Ultrasonic Vibrations”, International journal of Heat and mass Transfer, 48, pp. 703-718, 2005.
[8] Lee, D., Loh, B., “Smart Cooling Technology Utilizing Acoustic Streaming”, IEEE Transactions on Components and Packaging Technologies, 30 ,No. 4, pp. 691-699, Dec 2007.
[9] Iida, Y., Tsutsui, K., Ishii, R., Yamada, Y., “Natural-Convection Heat Transfer in a Field of Ultrasonic Waves and Sound Pressure”, Journal of Chemical Engineering of Japan, 24, No. 6, pp. 794-796, 1991.
[10] Nomura, S., Yamamoto, A., Murakami, K., “Ultrasonic Heat Transfer Enhancement using a Horn-Type Transducer”, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 41, No. 5 B, pp. 3217-3222, May 2002.
[11] Yukawa, H., Hoshino, T., Saito, H., “The Effect of Ultrasonic Vibrations on Free Convective Heat Transfer from Heated Wire to Water”, Heat Transfer-Japanese Research, 5, No. 1, pp. 37-49, 1976.
[12] Yukawa, H., Hoshino, T., Saito, H., “Effect of Ultrasonic Vibration on Free Convective Heat Transfer from an Inclined Plate in Water”, Heat Transfer-Japanese Research, 5, No. 4, pp. 1-16, 1976.
[13] Zhou, D.W., Liu, D.Y., Hu, X.G., Ma, C.F., “Effect of Acoustic Cavitation on Boiling Heat Transfer”, Experimental Thermal and Fluid Science, 26, pp. 931-938, 2002.
[14] Kim, H., Kim, Y.G., Kang, B.H., “Enhancement of Natural Convection and Pool Boiling Heat Transfer via Ultrasonic Vibration”, International Journal of Heat and Mass Transfer, 47, pp. 2831-2840, 2004.
[15] Fairbanks, H.V., “Influence of Ultrasound Upon Heat Transfer Systems”, Ultrasonic Symposium, pp. 384-387, 1979.
[16] Hamilton M.F., Blackstock D.T., “Nonlinear Acoustics”, Academic Press, California, U.S.A., 1998.
[17] Lienhard IV, J.H., Lienhard V, J.H., “A Heat Transfer Textbook”, Phlogiston Press, Third Edition, Cambridge, Massachusetts, U.S.A., 2006.

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