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ISSN Online: 2377-424X

International Heat Transfer Conference 5
September, 3-7, 1974, Tokyo, Japan

THE EFFECT OF ULTRASONIC VIBRATIONS ON THE STEADY STATE HEAT TRANSFER OF A BODY IN LIQUID HELIUM II

Get access (open in a dialog) DOI: 10.1615/IHTC5.2380
pages 363-367

Abstract

The effects of ultrasonic sound on the steady non-film boiling heat transfer from a horizontal cylinder immersed in a liquid helium II bath at 1.95K have been experimentally investigated. The sound field was generated by a cylindrical, piezoelectric transducer at a frequency of 44 kilohertz. The heat flux was varied from .05 to .3 watts/cm2. A decrease in heat transfer was observed for sound intensities greater than a critical sound intensity. The maximum observed decrease in heat flux was 30 per cent. The correlation of the results with acoustic mismatch theory, cavitation, and thermoacoustic streaming are discussed.