Ultrasonic Heat Transfer Enhancement Using a Horn-Type Transducer

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概要

• 論文の詳細を見る

• The purpose of this study is to clarify experimentally the influence of streaming induced by ultrasonic vibration on heat transfer using a horn-type ultrasonic vibrator. A horn tip of 6mm diameter and 60.7kHz resonant frequency was used as the ultrasonic transducer. Heat transfer experiments for a downward-facing horizontal heating surface with ultrasonic vibration from below were carried out in a natural convection region. The acoustic jet in the water from the horn tip of the transducer regarded as a nozzle exit was induced by this transducer, and as a result, up to a ten-fold increase in heat transfer coefficient was obtained by application of 20W in both tap water and degassed water. It was found that the mechanism of heat transfer enhancement by ultrasonic vibration in tap water can be classified into four categories. In degassed water, heat transfer enhancement is influenced not by the acoustic jet, but by small-scale perturbations by cavitation microjets. [DOI: 10.1143/JJAP.41.3217]

• 社団法人応用物理学会の論文
• 2002-05-30

著者

• YAMAMOTO Akira

  Department of Biopharmaceutics, Kyoto Pharmaceutical University

• 野村 信福

  愛媛大・工

• 野村 信福

  愛媛大 工

• NOMURA Shinfuku

  Department of Mechanical Engineering, Faculty of Engineering, Ehime University

• MURAKAMI Koichi

  Department of Mechanical Engineering, Faculty of Engineering, Ehime University

• Murakami K

  Institute Of Applied Physics University Of Tsukuba

• Nomura Shinfuku

  Department Of Mechanical Engineering Ehime University

• Yamamoto Akira

  Department Of Biopharmaceutics Kyoto Pharmaceutical University

• Murakami Koichi

  Department Of Mechanical Engineering Faculty Of Engineering Ehime University

• Yamamoto Akira

  Department Of Anatomy School Of Medicine University Of Tokushuma

• Murakami Koichi

  Department Of Mechanical Engineering Ehime University

• Yamamoto Akira

  Department Of Mechanical Engineering Faculty Of Engineering Ehime University

• Murakami Kouichi

  Institute Of Applied Physics University Of Tsukuba Tsukuba

• Yamamoto Akira

  Department Of Anatomy School Of Medicine University Of Tokushima

• Nomura Shinfuku

  Department of Engineering for Production and Environment, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan

• Murakami Koichi

  Department Mechanical Engineering, Faculty of Engineering, Ehime University

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