《Vibration analysis and sound field characteristics of a tubular ultrasonic radiator》.pdfVIP

Ultrasonics 45 (2006) 146–151 /locate/ultras Vibration analysis and sound field characteristics of a tubular ultrasonic radiator Zhaofeng Liang a,*, Guangping Zhou a, Yihui Zhang a, Zhengzhong Li a, Shuyu Lin b a Shenzhen Polytechnic, Shenzhen, Guangdong 518055, China b Applied Acoustics Institute, Shaanxi Normal University, Xi’an, Shaanxi 710062, China Received 2 December 2005; received in revised form 13 July 2006; accepted 20 July 2006 Available online 28 August 2006 Abstract A sort of tubular ultrasonic radiator used in ultrasonic liquid processing is studied. The frequency equation of the tubular radiator is derived, and its radiated sound field in cylindrical reactor is calculated using finite element method and recorded by means of aluminum foil erosion. The results indicate that sound field of tubular ultrasonic radiator in cylindrical reactor appears standing waves along both its radial direction and axial direction, and amplitudes of standing waves decrease gradually along its radial direction, and the numbers of standing waves along its axial direction are equal to the axial wave numbers of tubular radiator. The experimental results are in good agreement with calculated results. 2006 Elsevier B.V. All rights reserved. PACS: 43.35; 43.38 Keywords: Tubular radiator; Sound field characteristics; Vibration analysis; Frequency equation 1. Introduction cases. Moreover, it can be made to be a considerable length